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Mon 21 Feb 2011 |
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Description: Cryptography is practice or study of hiding information. If say Alice wants to send some secret information to Bob over a communication medium which is open and is accessible to everyone, she should scramble that message in such a way so that only bob will be able to make out of it. Or in other words, Alice will encrypt the plain text message</I> to generate <I>cipher text message. </I> and bob will decrypt the cipher text to generate same plain text message back. This whole process is called cryptography. <p> This video will answer the questions like what is the need to have cryptography? what are the requirements of a good cryptographic algorithm? The fundamental terms in cryptography and some basic algorithms. </p> <p> The fundamental objectives of any good cryptographic algorithm are - Authentication: The process of proving one's identity.
- Privacy/confidentiality: Ensuring that no one can read the message except the intended receiver.
- Integrity: Assuring the receiver that the received message has not been altered in any way from the original.
- Non-repudiation: A mechanism to prove that the sender really sent this message.
</p> Cryptography is the science of writing in secret code and is an ancient art; the first documented use of cryptography in writing dates back to circa 1900 B.C. when an Egyptian scribe used non-standard hieroglyphs in an inscription. <p> I will be creating a complete set of tutorial for understanding cryptography. This tutorial will include videos on symmetric key cryptography, public key cryptography to more advanced topics like zero knowledge proofs, key maintenance etc. </p> Useful links
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