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Seminar on (ENCODING AND DECODING TECHNIQUES)

Part 3 Protocols 1 Part III: Protocols Part 3 Protocols 2 Protocol Human protocols the rules followed in human interactions o Example: Asking a question.

2 classical cryptosystems

Classical Encryption

Data Protection Techniques and Cryptography

Block Ciphers 1 Block Ciphers Block Ciphers 2 Block Ciphers Modern version of a codebook cipher In effect, a block cipher algorithm yields a huge.

Cryptography Cryptography: art or science of keeping messages secret Cryptology: branch of mathematics that studies the mathematical foundations of cryptographic.

Introduction to Cryptography --- Foundations of information and network security --- Lecture 3.

Cryptography. Secret (crypto) Writing (graphy) –[Greek word] Practice and study of hiding information Concerned with developing algorithms for: –Conceal.

Symmetric key cryptography [email protected] 1. Symmetric Encryption Classic ciphers also known as (AKA) –single key –Secret key sender and recipient share.

1 Lecture #9 Traditional Cryptography HAIT Summer 2005 Shimrit Tzur-David.

Dissect and conquer: New algorithms for cryptanalysis of multiple encryption, knapsacks, etc. Nathan Keller Bar Ilan University Joint with Itai Dinur,