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Cryptography basics: What is Encryption and Decryption
 
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Get Full Course: http://www.engineeringmentor.com/CNYTv3 Networks #3: This tutorial introduces the Cryptography basics. It also explains what is Encryption and Decryption. a) Cryptography basics (00:21):http://youtu.be/BEb_AnPWPwY?t=21s how do we provide this security during transmission? Well, One way of ensuring security can be use of CRYPTOGRAPHY! Cryptography is a field of network security which deals with hiding "real" infromation when it is under transmission between the two parties. Usually, the real information is transformed or hidden into another message and transmitted over the network. This transformed message in itself will make no sense even if any hacker gets hold of this information. When it reaches the destination, the receipent will know a method to de-transform the garbage message into the original information which the sender had sent.method of transforming message at sender's side and de transforming at reciever's side forms the basic model of Cryptography. b) Encryption and Decryption (3:57):http://youtu.be/BEb_AnPWPwY?t=3m57s First, the information to be transmitted, called as plain text(or message) is fed to an Encryption system. The Encyrption system uses a key to convert the plain text to encyrpted form which looks like garbage value. This is also called as cipher text. A corresponding key is used at the other end to decrypt the cipher text back to original message. When we say a key, it actually means a piece of string value which is fed to encyprtion and decryption algorithms along with the text for transformation. When the message reaches the destination, this system at the other end decrypts the cipher text into original message with the help of the key. This is called as Decryption System. The output of the Decryption System is the intended message. Depending on how the keys are shared, we can classify crytography as symmetric and asymmetric. If the keys used by both parties are same, then it is called symmetric key cryptography, or private key cryptography. If both parties use different keys for encyrption and decryption, then it is called asymmetric key cryptography or public key cryptography. video URL : https://www.youtube.com/watch?v=BEb_AnPWPwY Watch ALL CN VIDEOS: https://www.youtube.com/playlist?list=PL9OIoIp8YySF4mkIihOb_j2HZIRIlYuEx For more, visit http://www.EngineeringMentor.com Facebook: https://www.facebook.com/EngineeringMentor Twitter : https://twitter.com/Engi_Mentor
Views: 108530 Skill Gurukul
Asymmetric encryption - Simply explained
 
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How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 496476 itfreetraining
What is Encryption? Public Key Encryption? Explained in Detail
 
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Namaskaar Dosto, is video mein maine aapko encryption ke baare mein bataya hai, aap sabhi ne computer aur internet use karte time Encryption aur decryption ke baare mein jarur suna hoga, usme aapko SSL encrytpion TSL Encryption, Public Key encryption, private key encryption wagereh ke baare mein bhi suna hoga, aur abhi recently whatsapp ne bhi end to end encryption launch kiya hai, toh aise mein hamare man mein bahut se sawaal hai ki aakhir yeh encryption hota kya hai? Encryption hum hamari email pe bhi use karte hai, aur hum online banking karte time bhi encryption ka use karte hai. Mujhe umeed hai ki yeh video dekhne ke baad aap encryption aur decryption ke baare mein sab kuch jaan jayenge, aur saath hi saath public key encryption ke baare mein bhi samajh jayenge. aur aap aaraam se whatsapp ke encryption feature ko bhi use kar payenge. Win Galaxy S7, S7 Edge Here: http://bit.ly/TheMegaGiveaway Share, Support, Subscribe!!! Subscribe: http://bit.ly/1Wfsvt4 Youtube: http://www.youtube.com/c/TechnicalGuruji Twitter: http://www.twitter.com/technicalguruji Facebook: http://www.facebook.com/technicalguruji Instagram: http://instagram.com/technicalguruji Google Plus: https://plus.google.com/+TechnicalGuruji About : Technical Guruji is a YouTube Channel, where you will find technological videos in Hindi, New Video is Posted Everyday :)
Views: 203956 Technical Guruji
What is Encryption [Hindi]
 
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Friends is video m hum Crytography,Encryption,Decryption,Symmetric key,Asymmetric key,Public key,Private key,Plain text and Cipher text kya hote hai in sb k bare main charcha krne wale hai or janne wale hai ki ye kya hote hai kaise ye kaam krte hai or in k kya kya fayde hai or sath hi hum ye bhi janenge ki Android Phone ko kaise encrypt kiya ja sakta hai toh is video ko End tak dekhen. I hope Aapko ye video Pasand aayegi Please Like,Share and SUBSCRIBE #JAI BHARAT It's My Passion Facebook :-https://www.facebook.com/TechnicalChoro Twitter:-https://twitter.com/TechnicalChoro Google+:-https://plus.google.com/b/114386885239188983906
Views: 24663 Technical Choro
Cryptography: The Science of Making and Breaking Codes
 
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There are lots of different ways to encrypt a message, from early, simple ciphers to the famous Enigma machine. But it’s tough to make a code truly unbreakable. Hosted by: Michael Aranda ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove, John Szymakowski, Fatima Iqbal, Justin Lentz, David Campos, and Chris Peters. ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow Or help support us by becoming our patron on Patreon: https://www.patreon.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow Sources: http://www.vectorsite.net/ttcode_04.html#m3 http://www.simonsingh.net/The_Black_Chamber/crackingprinciple.html http://book.itep.ru/depository/crypto/Cryptography_history.pdf http://www.cs.trincoll.edu/~crypto/historical/gronsfeld.html http://www.sans.org/reading-room/whitepapers/vpns/history-encryption-730 http://ftp.stmarys-ca.edu/jsauerbe/m10s11/chapter5.pdf http://www.turing.org.uk/scrapbook/ww2.html http://enigma.louisedade.co.uk/howitworks.html http://www.codesandciphers.org.uk/enigma/example1.htm http://www.pbs.org/wgbh/nova/military/how-enigma-works.html http://www.cs.miami.edu/~burt/learning/Csc609.051/notes/02.html
Views: 823223 SciShow
Passwords & hash functions (Simply Explained)
 
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How can companies store passwords safely and keep them away from hackers? Well let's find out! With all the data breaches lately, it's likely that the password of one of your accounts has been compromised. Hackers now might know the password you've used, but they also might not.. To understand why, we'll take a look at what methods a company can use to protect user passwords. We'll take a look at encryption, hash functions and a multilayer approach! 📚 Sources Can be found on my website: https://savjee.be/videos/simply-explained/hash-functions/ 🌍 Social Twitter: https://twitter.com/savjee Facebook: https://www.facebook.com/savjee ✏️ Check out my blog https://www.savjee.be
What is Encryption , Decryption & Public Key Encryption ? | Tamil Tech Explained
 
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என்கிரிப்சன் என்றால் என்ன ? தமிழ் டெக் What is Encryption, Decryption & Public Key Encryption? | Tamil Tech Explained.Like and Share this Video, Subscribe and Support us . More Tamil Tech Explained : https://goo.gl/Wxeip0 ****************************************************************** JOIN TAMIL TECH & Support us : Website : www.TamilTechOfficial.com YouTube : https://youtube.com/TamilTechOfficial Facebook: https://facebook.com/TamilTechOfficial/ Twitter: https://twitter.com/TamilTechOffici instagram : http://instagram.com/TamilTechOfficial ****************************************************************** இது போல இன்னும் பல tech வீடியோ உங்கள்ளுக்காக . SUBSCRIBE செய்யவும் . Check Other Videos of TAMIL TECH : FULL PLAYLIST : http://goo.gl/hKNNFX Tamil Tech News :https://goo.gl/0leUcj Tamil Tech Tips : https://goo.gl/nEdDeZ VR Series : https://goo.gl/iRPZ2i YouTuber Series : https://goo.gl/YvWnCX Tamil Tech Top APP Series : https://goo.gl/2mnxV9 Top Smartphones : https://goo.gl/SuXYhz Best Buy Tips : https://goo.gl/BTKvc9 My Opinions : https://goo.gl/41WgxA Whatsapp Tips & Tricks : https://goo.gl/A1qRo4 Super Gadget Unboxing & Review : https://goo.gl/edTy52 Android TIps & Tricks : https://goo.gl/OeD4m0 Real or Fake Series : https://goo.gl/sR9EH4 Tamil Tech Super app : https://goo.gl/C7872Y Tamil Tech Achivement : https://goo.gl/6rbl8c Tamil Tech Live QnA :https://goo.gl/LVFhyF Tamil Tech Prime : https://goo.gl/wSH6qD How to Tamil : https://goo.gl/npdNGR Tamil Tech Unboxng : https://goo.gl/KnhwJt ---------------------------------------­----------------------------------------­--------------------- My ENGLISH TECH CHANNEL - HOWISIT : YOUTUBE : https://www.youtube.com/c/howisitin Facebook: https://www.facebook.com/howisit.in , Twitter: https://www.twitter.com/howisitin , Google plus: https://plus.google.com/u/howisitin, website : http://howisit.in
PlayFair Cipher in Hindi – Complete Algorithm with Example
 
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PlayFair Cipher in Hindi – Complete Algorithm with Example Like FB Page - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Complete Data Structure Videos - https://www.youtube.com/playlist?list=PLV8vIYTIdSna11Vc54-abg33JtVZiiMfg Complete Java Programming Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbL_fSaqiYpPh-KwNCavjIr Previous Years Solved Questions of Java - https://www.youtube.com/playlist?list=PLV8vIYTIdSnajIVnIOOJTNdLT-TqiOjUu Complete DBMS Video Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnYZjtUDQ5-9siMc2d8YeoB4 Previous Year Solved DBMS Questions - https://www.youtube.com/playlist?list=PLV8vIYTIdSnaPiMXU2bmuo3SWjNUykbg6 SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnb7av5opUF2p3Xv9CLwOfbq PL-SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnadFpRMvtA260-3-jkIDFaG Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4
How secure is 256 bit security?
 
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Supplement to the cryptocurrency video: How hard is it to find a 256-bit hash just by guessing and checking? What kind of computer would that take? Cryptocurrency video: https://youtu.be/bBC-nXj3Ng4 Home page: https://www.3blue1brown.com/ Several people have commented about how 2^256 would be the maximum number of attempts, not the average. This depends on the thing being attempted. If it's guessing a private key, you are correct, but for something like guessing which input to a hash function gives the desired output (as in bitcoin mining, for example), which is the kind of thing I had in mind here, 2^256 would indeed be the average number of attempts needed, at least for a true cryptographic hash function. Think of rolling a die until you get a 6, how many rolls do you need to make, on average? Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 1057744 3Blue1Brown
[Hindi] What is Cryptography ? | Kya hai cryptography ? | Explained in simple words
 
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Hello Dosto Aaj hum baat karenge cryptography ke bare me ki ye kya hota hai aur iska itemaal kaise aur kaha hota hai. iska sambandh kisi bhi data ya message ko safely pohchane se hota hai aur uski security badhayi jati hai taaki bich me koi an-adhikarik tarike se usko access na kar paye. aasha karta hoo apko ye video pasand ayegi agar aapko ye video achhi lage to isse like kare aur apne dosto ke sath share kare aur abhi tak aapne mera channel subscribe nahi kia hai to jarur is channel ko subscribe kare. Subscribe to my channel for more videos like this and to support my efforts. Thanks and Love #TechnicalSagar LIKE | COMMENT | SHARE | SUBSCRIBE ---------------------------------------------------------------------------------- For all updates : SUBSCRIBE Us on Technical Sagar : www.youtube.com/technicalsagarindia LIKE us on Facebook https://www.facebook.com/technicalsagarindia Follow us on Twitter : http://www.twitter.com/iamasagar
Views: 102204 Technical Sagar
What is Cryptography
 
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www.hiteshChoudhary.com www.newdemy.com What is Cryptography? Cryptography is a very interesting science of information security. The word Cryptography is derived from Greek kryptos, meaning hidden. Cryptography is not alone word or one word for all related information security science. Words like cryptanalysis, cipher and cryptology are always included in this science. Cryptography includes techniques such as microdots, merging words with images, and other ways to hide information in storage or transit. However, in today's computer-centric world, cryptography is most often associated with scrambling plaintext (ordinary text, sometimes referred to as clear text) into cipher text (unreadable text obtained after a process called encryption), then back again (known as decryption). Individuals who practice this field are known as cryptographers. There is also a word, Cryptosystem that you will see a lot in this video course. Procedures and protocols that are used in cryptography makes up a system that is known as cryptosystem. Cryptosystem are mostly referred as computer programs or protocols but I would like it to extend to a much wider plot. It also include human behavior as social engineering is still one of the fastest technique to compromise a system or application. Things like choosing typical password, logging off unused systems, protecting sensitive files also plays a vital role in cryptosystem. Although, it is considered that 1st use of modern cryptography was by Julius Caesar, who did not trust his messenger when communicating with his governors. But I think the need of encryption came in high demand after the invention of radio as one can tune into your frequency range and intercept your message. But if the transmission is encrypted then things get changed. In recent times, cryptography has turned into a battleground of some of the world's best mathematicians and computer scientists. The ability to securely store and transfer sensitive information has proved a critical factor in success in war and business. To understand more about cryptography, let’s call our friends Alice and Bob. Now Alice wants to transfer some information to Bob but wants to do it securely. Alice decided that instead of transferring information in clear text form, I’ll encrypt this text with some algorithm and key. Then I’ll pass this cipher text. Now bob should also have the key and decryption algorithm to read the information. The two major problems are secure transfer of key and knowledge about algorithm. Things like degree of complexity of algorithm and its randomness also plays a vital role in cryptography. This course is going to be a detailed overview about all these things.
Views: 3915 Hitesh Choudhary
What is Cryptography - Introduction to Cryptography - Lesson 1
 
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In this video I explain the fundamental concepts of cryptography. Encryption, decryption, plaintext, cipher text, and keys. Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm Donate - http://bit.ly/19AHMvX STILL NEED MORE HELP? Connect one-on-one with a Math Tutor. Click the link below: https://trk.justanswer.com/aff_c?offer_id=2&aff_id=8012&url_id=232 :)
Views: 103614 Learn Math Tutorials
Password Hashing, Salts, Peppers | Explained!
 
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---------------------------------------------------------------------------------------------- Check out my site: http://www.seytonic.com Follow me on twitter: https://twitter.com/seytonic
Views: 68802 Seytonic
What is Cryptography in telugu || Encryption and Decryption in telugu..
 
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Cryptography || Encryption|| Decryption || Symmetry and asymmetric cryptography..in telugu.. """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Cryptography -------------------- Cryptography deal's with safeguarding the information by transformation the data into unreadable format.. ------------------- ------------------- Contents included in this video. ******************************** 1.About Cryptography 2. Understanding cryptography 3. How it works 4. Encryption 5. Decryption 6. Symmetric and asymmetric cryptography.. 7. Terminology.. '''''''""""""""""""""""""""""""""""""""""""""""""""""""""""" Meta data (SEO) ~~~~~~~~~~ Cryptography Encryption Decryption telugu in telugu hacking hacking in telugu cryptography in telugu Encryption in telugu Decryption in telugu what is Encryption what is Decryption Symmetry symmetric asymmetric what what is how to..
Views: 3925 Deepak deepu
What is CRYPTOGRAPHIC SPLITTING? What does CRYPTOGRAPHIC SPLITTING mean?
 
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What is CRYPTOGRAPHIC SPLITTING? What does CRYPTOGRAPHIC SPLITTING mean? CRYPTOGRAPHIC SPLITTING definition - CRYPTOGRAPHIC SPLITTING explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Cryptographic splitting, also known as cryptographic bit splitting or cryptographic data splitting, is a technique for securing data over a computer network. The technique involves encrypting data, splitting the encrypted data into smaller data units, distributing those smaller units to different storage locations, and then further encrypting the data at its new location. With this process, the data is protected from security breaches, because even if an intruder is able to retrieve and decrypt one data unit, the information would be useless unless it can be combined with decrypted data units from the other locations. The technology was filed for patent consideration in June 2003, and the patent was granted in June 2008. Cryptographic splitting utilizes a combination of different algorithms to provide the data protection. A block of data is first encrypted using the AES-256 government encryption standard. The encrypted bits are then split into different shares and then each share is hashed using the National Security Agency's SHA-256 algorithm. One application of cryptographic splitting is to provide security for cloud computing. The encrypted data subsets can be stored on different clouds, with the information required to restore the data being held on a private cloud for additional security. Security vendor Security First Corp uses this technology for its Secure Parser Extended (SPx) product line. In 2009, technology services company Unisys gave a presentation about using cryptographic splitting with storage area networks. By splitting the data into different parts of the storage area network, this technique provided data redundancy in addition to security. Computer giant IBM has written about using the technology as part of its Cloud Data Encryption Services (ICDES). The technology has also been written about in the context of more effectively using sensitive corporate information, by entrusting different individuals within a company (trustees) with different parts of the information.
Views: 249 The Audiopedia
Cryptography Lesson #1 - Block Ciphers
 
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This tutorial video will help provide an understanding of what block ciphers are, and how they are used in the field of cryptography.
Views: 148225 Ryan Kral
Types of Cryptography
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 4652 Udacity
what is encryption and decryption ? about cryptography | TECH SETTAI TAMIL
 
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what is encryption and decryption ? about cryptography | TECH SETTAI TAMIL its about the type of attack in cryptography, use of encryption and decryption. why encryption are used where encryption are used types of attack in cryptography and more SUBSCRIBE US BY CLICKING RED SUBSCRIBE BUTTON, SUPPORT US ON FB, TWITTER AND ALSO G+ twitter: https://twitter.com/TechSettai fb:https://www.facebook.com/techsettai/ g+ :https://plus.google.com/u/1/117864875... -~-~~-~~~-~~-~- Please watch: "how to install app not available in INDIA | TECH SETTAI TAMIL" https://www.youtube.com/watch?v=wF5JAhDvPQM -~-~~-~~~-~~-~-
IDEA(International Data Encryption Algorithm) in hindi | CSS series #9
 
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Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 52484 Last moment tuitions
Public Key Cryptography: RSA Encryption Algorithm
 
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RSA Public Key Encryption Algorithm (cryptography). How & why it works. Introduces Euler's Theorem, Euler's Phi function, prime factorization, modular exponentiation & time complexity. Link to factoring graph: http://www.khanacademy.org/labs/explorations/time-complexity
Views: 582064 Art of the Problem
Caesar Cipher
 
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This tutorial will teach you how to encrypt and decrypt messages using the Caesar Cipher.-- Created using PowToon -- Free sign up at http://www.powtoon.com/ . Make your own animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 152734 Lacey Wright
Cryptography: Crash Course Computer Science #33
 
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Today we’re going to talk about how to keep information secret, and this isn’t a new goal. From as early as Julius Caesar’s Caesar cipher to Mary, Queen of Scots, encrypted messages to kill Queen Elizabeth in 1587, theres has long been a need to encrypt and decrypt private correspondence. This proved especially critical during World War II as Allan Turing and his team at Bletchley Park attempted to decrypt messages from Nazi Enigma machines, and this need has only grown as more and more information sensitive tasks are completed on our computers. So today, we’re going to walk you through some common encryption techniques such as the Advanced Encryption Standard (AES), Diffie-Hellman Key Exchange, and RSA which are employed to keep your information safe, private, and secure. Note: In October of 2017, researchers released a viable hack against WPA2, known as KRACK Attack, which uses AES to ensure secure communication between computers and network routers. The problem isn't with AES, which is provably secure, but with the communication protocol between router and computer. In order to set up secure communication, the computer and router have to agree through what's called a "handshake". If this handshake is interrupted in just the right way, an attacker can cause the handshake to fault to an insecure state and reveal critical information which makes the connection insecure. As is often the case with these situations, the problem is with an implementation, not the secure algorithm itself. Our friends over at Computerphile have a great video on the topic: https://www.youtube.com/watch?v=mYtvjijATa4 Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Carrie Anne? https://about.me/carrieannephilbin The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Want to find Crash Course elsewhere on the internet? Facebook - https://www.facebook.com/YouTubeCrash... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 231538 CrashCourse
What is Cryptography? - Encryption and Decryption
 
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Understand the basics of cryptography and the concept of symmetric or private key and asymmetric or public key cryptography. Also, a simple example of how cryptography is applied in web browsers. Link to "Applications of Public Key Cryptography" video: https://www.youtube.com/watch?v=Uk1mjEpW33s
Views: 7629 Biz Sci Tech
Digital Signatures
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 62086 Udacity
Symmetric vs Asymmetric ( public key )  Cryptography
 
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Lesson 2 of cryptography series (to see all video check cryptography playlist - link given below). cryptography playlist : https://www.youtube.com/watch?v=_Yw7QWbk9Vs&list=PLf8bMP4RWebLVGpUnhji9Olkj1jdXfzFd Subscribe to our new youtube channel also : https://www.youtube.com/channel/UCNx1Gkyy9LfOxDMbcOKuV4g symmetric vs asymmetric ( public key ) cryptography symmetric key vs assymetric key encryption advantages of symmetric key cryptography advantages of assymetric cryptography concept of digital signatures safe and secure communication between systems encrypted communication between systems like us on facebook : https://www.facebook.com/guidetohacking/ #symmetric #asymmetric #public #key #cryptography #encryption
Hashing Algorithms and Security - Computerphile
 
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Audible free book: http://www.audible.com/computerphile Hashing Algorithms are used to ensure file authenticity, but how secure are they and why do they keep changing? Tom Scott hashes it out. More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Pigeon Sound Effects courtesy of http://www.freesfx.co.uk/ Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 786802 Computerphile
NETWORK SECURITY - PUBLIC KEY DISTRIBUTION
 
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There are four ways to distribute the public keys among the users. 1) Public Announcement 2) Public Key Directory 3) Public Key Authority 4) Certificate Authority
What is Cryptography In Hindi II Cryptography Details In Hindi II Cryptography Explained In Hindi
 
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Hindi Mein Jaankari Amazon Shopping Link:- https://www.amazon.com/shop/hindimeinjaankari --~-- What is Cryptography In Hindi II Cryptography Details In Hindi II Cryptography Explained In Hindi Hello Friends welcome to my channel Hindi Mein Jaankari...HMJ Dosto aaj ke is video mein hum baat karenge what is cryptography dosto agar aap internet user hain to aapne kabhi na kabhi cryptography ke baare mein jarur suna hoga agar nahin to is video ko pura dekhe dosto aaj ke is video mein aapko cryptography details in hindi mein batayenge aur yeh kya kaam karta hai aur cryptography ke kya fayade hain yeh pura chapter cryptography explained in hindi mein karenge. Dosto jab bhi aap koi email ya message kisi ko bhejte hain yar phir aapka jo data hai aap jiske saath share karna chahte aur aap chahte ki aapta data private rahe aur koi bhi us data ko server aur aapke beech se na chura sake to dosto is cryptography kahte hain dosto ismein jo bhi aapka data hota use encrypt kar dia jaata hai aur jiske saath aap data ko share karte hai woh us data ko decrypt karta hai aur use read kar leta hai dosto jitni bhi website hain jine address baar mein https likha aata hai green colour mein woh ssl protect websites hote hain aapke data ko aapke information ko encrypt kar ke server mein store karti hain taki aapki information ko koi na chura sake. Dosto what is cryptography ya cryptography details in hindi ke baare mein aapko is video mein bahut kuch pata chalega dosto cryptography ko 2 parts mein devide kia hai symetric cryptography aur asymetric cryptography. ====================================================== PLZ …..LIKE………SHARE………COMMENT……..SUBSCRIBE…. Follow Us On Social Media:- Follow Us On Facebook:- https://www.facebook.com/Hindi-Mein-Jaankari-178986192654764/ Follow Us On Twitter:-https://twitter.com/meinjaankari Follow Us On Instagram:-https://www.instagram.com/hindimeinjaankari/ Follow Us On Google Plus:- https://plus.google.com/u/0/114440527599226210280 Follow Us On Pinterest:- www.pinterest.com/hindimeinjaankari ====================================================== Background Music:- Ishikari Lore by Kevin MacLeod is licensed under a Creative Commons Attribution license http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100192
Views: 19272 Hindi Mein Jaankari
Symmetric and Asymmetric Key Cryptography
 
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Symmetric and Asymmetric Key Cryptography Watch more Videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Arnab Chakraborty, Tutorials Point India Private Limited
NETWORK SECURITY - DES (DATA ENCRYPTION STANDARD) ALGORITHM
 
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DES algorithm follows the Feistel Structure Most of the Block cipher algorithms follows Feistel Structure BLOCK SIZE - 64 bits Plain Text No. of Rounds - 16 Rounds Key Size - 64 bits Sub Key Size - 48 bits No. of Sub Keys - 16 Sub Keys Cipher Text - 64 bits
Views: 188416 Sundeep Saradhi Kanthety
Introduction to Encryption and Decryption {தமிழ்}
 
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Data Encryption and Decryption. Encryption is the process of translating plain text data (plaintext) into something that appears to be random and meaningless (ciphertext). Decryption is the process of converting ciphertext back to plaintext. To encrypt more than a small amount of data, symmetric encryption is used. Videos in Tamil https://goo.gl/2sUk1B Videos in English https://goo.gl/TZdAvK YouTube channel link www.youtube.com/atozknowledgevideos Website http://atozknowledge.com/ Technology in Tamil & English
Views: 3576 atoz knowledge
What is CHAOTIC CRYPTOLOGY? What does CHAOTIC CRYPTOLOGY mean? CHAOTIC CRYPTOLOGY meaning
 
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What is CHAOTIC CRYPTOLOGY? What does CHAOTIC CRYPTOLOGY mean? CHAOTIC CRYPTOLOGY meaning - CHAOTIC CRYPTOLOGY definition - CHAOTIC CRYPTOLOGY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Chaotic cryptography is the application of the mathematical chaos theory to the practice of the cryptography, the study or techniques used to privately and securely transmit information with the presence of a third-party or adversary. The use of chaos or randomness in cryptography has long been sought after by entities wanting a new way to encrypt messages. However, because of the lack of thorough, provable security properties and low acceptable performance, chaotic cryptography has encountered setbacks. In order to use chaos theory efficiently in cryptography, the chaotic maps should be implemented such that the entropy generated by the map can produce required Confusion and diffusion. Properties in chaotic systems and cryptographic primitives share unique characteristics that allow for the chaotic systems to be applied to cryptography. If chaotic parameters, as well as cryptographic keys, can be mapped symmetrically or mapped to produce acceptable and functional outputs, it will make it next to impossible for an adversary to find the outputs without any knowledge of the initial values. Since chaotic maps in a real life scenario require a set of numbers that are limited, they may, in fact, have no real purpose in a cryptosystem if the chaotic behavior can be predicted. One of the most important issues for any cryptographic primitive is the security of the system. However, in numerous cases, chaos-based cryptography algorithms are proved unsecure. The main issue in many of the cryptanalyzed algorithms is the inadequacy of the chaotic maps implemented in the system. The concept of chaos cryptography or in the other words chaos-based cryptography can be divided into two major groups: the asymmetric and symmetric chaos-based cryptography. The majority of the symmetric chaos-based algorithms are based on the application of discrete chaotic maps in their process. Bourbakis and Alexopoulos in 1991 proposed supposedly the earliest fully intended digital image encryption scheme which was based on SCAN language. Later on, with the emergence of chaos-based cryptography hundreds of new image encryption algorithms, all with the aim of improving the security of digital images were proposed. However, there were three main aspects of the design of an image encryption that was usually modified in different algorithms (chaotic map, application of the map and structure of algorithm). The initial and perhaps most crucial point was the chaotic map applied in the design of the algorithms. The speed of the cryptosystem is always an important parameter in the evaluation of the efficiency of a cryptography algorithm, therefore, the designers were initially interested in using simple chaotic maps such as tent map, and the logistic map. However, in 2006 and 2007, the new image encryption algorithms based on more sophisticated chaotic maps proved that application of chaotic map with higher dimension could improve the quality and security of the cryptosystems. The unpredictable behavior of the chaotic maps can be used in the generation of random numbers. Some of the earliest chaos-based random number generators try to directly generate random numbers form the logistic map.
Views: 2463 The Audiopedia
Cryptography Tools
 
42:50
Views: 18619 RadwanoVetch
What is Cryptology,Cryptography and Cryptanalysis?(NETWORK SECURITY)
 
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Learn network security in a simple and a easy way. What is Cryptology,Cryptography and Cryptanalysis?(NETWORK SECURITY)
Views: 6745 Programming Nightmare
Famous UNCRACKED Codes That STILL Exist!
 
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Check out these famous uncracked codes that still exist! From secret riddles to unsolved mysteries, this top 10 list contains cryptography that's still unexplained today! Subscribe For New Videos! http://goo.gl/UIzLeB Watch our "Most CRAZY Things Ancient Egyptians Did!" video here: https://youtu.be/T0zERiMJFQo Watch our "Most CRAZY Things Ancient Greeks Did!" video here: https://youtu.be/-JkhVvn_dow Watch our "REAL Evidence That Aliens EXIST!" video here: https://youtu.be/dtwJT2eilx0 10. Chinese Gold Bar Cipher In 1933, General Wang in Shanghai, China, allegedly received seven gold bars. These gold bars appear to represent metal certificates related to a bank deposit with a U.S. Bank. The gold bars themselves have pictures, Chinese writing, some form of script writing, and cryptograms in Latin letters. Not surprisingly, experts debate concerning the validity of the claim for the deposit. It may help to resolve the dispute if someone can decipher the cryptograms on the bars. Someone translated the Chinese writing, which discusses a transaction in excess of $300,000,000. It also refers to these gold bars, which weigh a total of 1.8 kilograms. The rest remains a mystery. 9. D’agapeyeff Cipher The D’Agapeyeff cipher is an as-yet unbroken cipher that appears in the first edition of Codes and Ciphers, an elementary book on cryptography published by the Russian-born English cartographer Alexander D’Agapeyeff in 1939. Offered as a “challenge cipher” at the end of the book, it was not included in later editions. D’Agapeyeff supposedly admitted later to having forgotten how he had encrypted it. Some argue that the failure of all attempts at decryption is due to D’Agapeyeff incorrectly encrypting the original text. However, it has also been argued that the cipher may still be successfully attacked using computational methods such as genetic algorithms. Whatever those are. 8. The Beale Ciphers If this next one isn’t a hoax then the person who solves it could become very, very rich. This question of authenticity has bothered cryptoanalysts ever since these ciphers first appeared in an 1885 pamphlet called The Beale Papers, which recounts a fantastic story of buried treasure. According to the pamphlet, a man named Thomas Jefferson Beale, a man no one has proven even existed, discovered gold during an 1816 expedition into the American West. The treasure, as the story goes, was then transported to Bedford County, Virginia, and buried. The gold's secret location was allegedly provided by three cryptograms, of which one was already cracked. Unfortunately, the cracked code only detailed the type of treasure there and not a specific location. To find out anything more specific would involve cracking the two other ciphers. The problem is that figuring it out requires comparing them to unknown historical texts. The decrypted cipher, for example, used the Declaration of Independence. The first number, 115, corresponds with the first letter of the 115th word in the Declaration: "instituted." That means 115 stands for "I." So what are the translation texts for the other two ciphers? No one knows, and they may very well not exist at all. There are also questions over whether the other ciphers may just be unintelligible, as if the whole thing was made up by the pamphlet's author decades after the gold was supposed to have been discovered. 7. Dorabella In 1897, a 40-year-old composer named Edward Elgar sent an encrypted letter to 23-year-old Dora Penny, the stepdaughter of one of his friends. Why he sent it is part of the mystery and can only be answered if anyone ever cracks the code. To figure it out would involve deciphering 87 characters all made of strings of semi-circles oriented in different directions. Attempts at translating the cipher yielded a message just short of gibberish. Experts say that shorter ciphers are always harder to solve. Another theory has it that the code is an example of a distinct private language shared only between Penny and Elgar. If that's the case, then solving it may be simply impossible, since no one but them would understand the references. In 2016, a police officer in Cleveland believes he’s cracked at least part of the code, revealing a line of melody. Inspector Mark Pitt read 100 books on the Dorabella Cipher; he hopes to write one on his discoveries. Whether or not that’s really the meaning, though, remains to be seen. Origins Explained is the place to be to find all the answers to your questions, from mysterious events and unsolved mysteries to everything there is to know about the world and its amazing animals!
Views: 1350796 Origins Explained
What is Hashing? Hash Functions Explained Simply
 
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What is hashing? In this video we explain how hash functions work in an easy to digest way. Hashing is the process of converting an input of any length into a fixed size string of text, using a mathematical function. 👩‍🎓👨‍🎓Learn blockchain fast at the Lisk Academy: https://lisk.io/academy Thanks for watching! Lisk makes it easy for developers to build and deploy blockchain applications in JavaScript. Learn about the leading platform for world-changing dapps at https://lisk.io/products. 👨‍💻👩‍💻 For developers: Documentation: https://lisk.io/documentation GitHub: https://github.com/LiskHQ Gitter: https://gitter.im/LiskHQ/lisk 🔒 Store your LSK in our official wallet: https://lisk.io/hub/ 🔎 View our blockchain explorer: https://explorer.lisk.io/ 🗞Read our latest news on the Lisk Blog: https://blog.lisk.io/ 👩‍🚀👨‍🚀 Meet the team: https://lisk.io/team 🎥 For media inquiries, please email us at press [at] lisk [dot] io. 👫Join our community channels: Reddit: http://reddit.com/r/lisk Twitter: http://twitter.com/liskhq Telegram: https://t.me/Lisk_HQ Lisk.chat: https://lisk.chat/ Instagram: http://instagram.com/liskhq Facebook: http://facebook.com/liskhq LinkedIn: https://www.linkedin.com/company/lisk/
Views: 39539 Lisk
How hash function work?
 
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What is hash function/algorithm? What is mainly used for? What are three basic characteristics of a secure hash algorithm? In this video, I will also demonstrate how hash function works. Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Please leave comments, questions, and Please subscribe! Thank you very much! Sunny Classroom
Views: 49051 Sunny Classroom
Cryptography | Blockchain
 
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In this video we will discuss : Peer to peer network Confidentiality Integrity Non-repudiation Authentication Cryptography Encryption Decryption #blockchain #cryptography #P2P #confidentiality #integrity #authentication #nonrepudiation Editing Monitors : https://amzn.to/2RfKWgL https://amzn.to/2Q665JW https://amzn.to/2OUP21a. Check out our website: http://www.telusko.com Follow Telusko on Twitter: https://twitter.com/navinreddy20 Follow on Facebook: Telusko : https://www.facebook.com/teluskolearn... Navin Reddy : https://www.facebook.com/navintelusko Follow Navin Reddy on Instagram: https://www.instagram.com/navinreddy20 Subscribe to our other channel: Navin Reddy : https://www.youtube.com/channel/UCxmk... Telusko Hindi : https://www.youtube.com/channel/UCitz... Donation: PayPal Id : navinreddy20 Patreon : navinreddy20 http://www.telusko.com/contactus
Views: 13519 Telusko
Secrets of the Encrypted Internet—Worldwide Cryptographic Statistics
 
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David Holmes, Threat Researcher, F5 Networks Key findings from a multiyear, multinode cryptographic scanning project. We sampled tens of millions of Internet hosts since 2014, including every host in the Alexa and OpenDNS Top 1 million to track cipher selection rates, security headers, and fingerprint TLS stacks and web servers for statistical analysis. This talk will present the findings, the scanner architecture and the release of its source code. Learning Objectives: 1: Explore key findings of adoption rates of significant global SSL/TLS trends. 2: Explore the architecture/challenges of a distributed cryptographic TLS scanner. 3: Obtain source code for distributed cryptographic TLS statistic scanner. https://www.rsaconference.com/videos/secrets-of-the-encrypted-internetworldwide-cryptographic-statistics
Views: 175 RSA Conference
Cryptology vs. Cryptography
 
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Students are often confused as to the difference between "cryptology" and "cryptography". To make matters worse, they often hear the term "cryptography" used incorrectly to mean cryptology. Technically speaking, Cryptology is the field that encompasses both Cryptography (code making) and Cryptanalysis (code breaking). However, people outside the field will use the term "cryptography" because "cryptology" just isn't a very well-known word. Our homepage: https://plaincipher.org
Cryptographic Algorithms
 
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Read more about this and watch video on my science popularization site: http://scienceup.org/computer-science/cryptographic-algorithms/
Views: 338 crnazvijezda
Java Cryptography Tutorials 1 AES Encryption and Decryption using Java
 
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In this video you will see how to encrypt and decrypt the text information using the AES algorithm in Java Cryptography. For more tutorials visit: http://www.step2know.com
Views: 52159 Amarnath R
Will Quantum Computers break encryption?
 
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How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life? Facebook: https://www.facebook.com/frameofessence Twitter: https://twitter.com/frameofessence YouTube: https://www.youtube.com/user/frameofessence CLARIFICATIONS: You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers. CORRECTIONS: [2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video. [5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it. Video links: Encryption and HUGE numbers - Numberphile https://youtu.be/M7kEpw1tn50 The No Cloning Theorem - minutephysics https://youtu.be/owPC60Ue0BE Quantum Entanglement & Spooky Action at a Distance - Veritasium https://youtu.be/ZuvK-od647c Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Random person talking about Quantum MITM attacks http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too The Ekert Protocol (i.e. E91) http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf Annealing vs. Universal Quantum Computers https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1 Images, Documents, and Screenshots: Post-Quantum Cryptography initiatives http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html http://pqcrypto.eu.org/docs/initial-recommendations.pdf Internet map (Carna Botnet) http://census2012.sourceforge.net/ Quantum network maps https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks http://www.secoqc.net/html/press/pressmedia.html IBM Quantum http://research.ibm.com/ibm-q/ Music: YouTube audio library: Blue Skies Incompetech: Jay Jay Pamgaea The House of Leaves Premium Beat: Cutting Edge Technology Second Time Around Swoosh 1 sound effect came from here: http://soundbible.com/682-Swoosh-1.html ...and is under this license: https://creativecommons.org/licenses/sampling+/1.0/
Views: 780408 Frame of Essence
What Is CRYPTOGRAPHY? CRYPTOGRAPHY Definition & Meaning
 
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What is CRYPTOGRAPHY, What does CRYPTOGRAPHY mean, CRYPTOGRAPHY meaning, CRYPTOGRAPHY definition, CRYPTOGRAPHY explanation Cryptography or cryptology (from Ancient Greek: κρυπτός, translit. kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively[1]) is the practice and study of techniques for secure communication in the presence of third parties called adversaries.[2] More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages;[3] various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation[4] are central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, electrical engineering, communication science, and physics. Applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications. Cryptography prior to the modern age was effectively synonymous with encryption, the conversion of information from a readable state to apparent nonsense. The originator of an encrypted message shared the decoding technique needed to recover the original information only with intended recipients, thereby precluding unwanted persons from doing the same. The cryptography literature often uses the name Alice ("A") for the sender, Bob ("B") for the intended recipient, and Eve ("eavesdropper") for the adversary.[5] Since the development of rotor cipher machines in World War I and the advent of computers in World War II, the methods used to carry out cryptology have become increasingly complex and its application more widespread. Modern cryptography is heavily based on mathematical theory and computer science practice; cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in practice by any adversary. It is theoretically possible to break such a system, but it is infeasible to do so by any known practical means. These schemes are therefore termed computationally secure; theoretical advances, e.g., improvements in integer factorization algorithms, and faster computing technology require these solutions to be continually adapted. There exist information-theoretically secure schemes that probably cannot be broken even with unlimited computing power—an example is the one-time pad—but these schemes are more difficult to implement than the best theoretically breakable but computationally secure mechanisms. The growth of cryptographic technology has raised a number of legal issues in the information age. Cryptography's potential for use as a tool for espionage and sedition has led many governments to classify it as a weapon and to limit or even prohibit its use and export.[6] In some jurisdictions where the use of cryptography is legal, laws permit investigators to compel the disclosure of encryption keys for documents relevant to an investigation.[7][8] Cryptography also plays a major role in digital rights management and copyright infringement of digital media.[9] Source: Wikipedia.org
Views: 40 Audiopedia
Feistel Cipher and Data Encryption Standard (DES)
 
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Feistel Cipher named after German born Horst Feistel utilizes the concept of product cipher, which is execution of two or more encryption methods in a sequence in such a way that the final result or product is cryptographically stronger than any of the component ciphers. Data Encryption Standard (DES) is one of the implementation of Feistel cipher. It is block cipher. It uses 64 bits block and 64 bits key. Written Transcript: https://kshitijdhakal.blogspot.com/2018/08/feistel-cipher-and-data-encryption.html
Views: 4558 Kshitij Dhakal
What is CLIENT-SIDE ENCRYPTION? What does CLIENT-SIDE ENCRYPTION mean?
 
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What is CLIENT-SIDE ENCRYPTION? What does CLIENT-SIDE ENCRYPTION mean? CLIENT-SIDE ENCRYPTION meaning - CLIENT-SIDE ENCRYPTION definition - CLIENT-SIDE ENCRYPTION explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Client-side encryption is the cryptographic technique of encrypting data on the sender's side, before it is transmitted to a server such as a cloud storage service. Client-side encryption features an encryption key that is not available to the service provider, making it difficult or impossible for service providers to decrypt hosted data. Client-side encryption allows for the creation of zero-knowledge applications whose providers cannot access the data its users have stored, thus offering a high level of privacy. Client-side encryption is widely recognized as an exceptionally robust data security strategy. By eliminating the potential for data to be viewed by service providers (or third parties that compel service providers to deliver access to data), client-side encryption ensures that data and files that are stored in the cloud can only be viewed on the client side of the exchange. This prevents data loss and the unauthorized disclosure of private or personal files, providing increased peace of mind for both personal and business users. Current academic scholarship as well as recommendations by industry professionals provide much support for developers to include client-side encryption to protect the confidentiality and integrity of information. Examples of cloud storage services that provide client-side encryption are Tresorit, MEGA and SpiderOak. As of February 2016, neither Apple iCloud, Google Drive, or Dropbox provide client-side encryption.
Views: 697 The Audiopedia
What is SIGNCRYPTION? What does SIGNCRYPTION mean? SIGNCRYPTION meaning & explanation
 
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What is SIGNCRYPTION? What does SIGNCRYPTION mean? SIGNCRYPTION meaning - SIGNCRYPTION pronunciation - SIGNCRYPTION definition - SIGNCRYPTION explanation - How to pronounce SIGNCRYPTION? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, signcryption is a public-key primitive that simultaneously performs the functions of both digital signature and encryption. Encryption and digital signature are two fundamental cryptographic tools that can guarantee the confidentiality, integrity, and non-repudiation. Until 1997, they were viewed as important but distinct building blocks of various cryptographic systems. In public key schemes, a traditional method is to digitally sign a message then followed by an encryption (signature-then-encryption) that can have two problems: Low efficiency and high cost of such summation, and the case that any arbitrary scheme cannot guarantee security. Signcryption is a relatively new cryptographic technique that is supposed to perform the functions of digital signature and encryption in a single logical step and can effectively decrease the computational costs and communication overheads in comparison with the traditional signature-then-encryption schemes. Signcryption provides the properties of both digital signatures and encryption schemes in a way that is more efficient than signing and encrypting separately. This means that at least some aspect of its efficiency (for example the computation time) is better than any hybrid of digital signature and encryption schemes, under a particular model of security. Note that sometimes hybrid encryption can be employed instead of simple encryption, and a single session-key reused for several encryptions to achieve better overall efficiency across many signature-encryptions than a signcryption scheme but the session-key reuse causes the system to lose security under even the relatively weak CPA model. This is the reason why a random session key is used for each message in a hybrid encryption scheme but for a given level of security (i.e., a given model, say CPA), a signcryption scheme should be more efficient than any simple signature-hybrid encryption combination.
Views: 156 The Audiopedia
Hashing (OTP) / Hash fuction (meaning and introduction) cryptography and network security in hindi.
 
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Please Fill the form - https://docs.google.com/forms/d/1kOxvqvz1IvBMHJ3UeLecLDuK7ePKjHAvHaRcxduHKEE/edit ====================================================== Answer of your Questions Asked to me. (direct Link given below) Blogger Link - http://shalik-htd.blogspot.com/ ====================================================== Hey, friends, I upload the videos in this channel in Hindi for Engineering student of UPTU and other universities for computer science and IT (information technology) students. like share and subscribe my channel ====================================================== Install C Programming Solution Android app - https://play.google.com/store/apps/details?id=com.shalik.patel.cprogrammingsolution ====================================================== ====================================================== My Career Planning android app - https://play.google.com/store/apps/details?id=guide.mycareer.com.rec.mycareer ====================================================== ====================================================== My Android App for my College Library (An Official App Of College Library) - https://play.google.com/store/apps/details?id=jrv.library.rec.reclibrary ====================================================== How to use android application - https://www.youtube.com/watch?v=1hMZCvl-JxM ====================================================== Contact me on Facebook - https://www.facebook.com/HTD-hub-250593705388294/?ref=br_rs ====================================================== Follow me on twitter - https://twitter.com/PatelShalik ======================================================