Information Security: 3. Classical Encryption Technique
3.1 Symmetric Cipher Model
Steps:
Plaintext input
Encryption algorithm: Y = E(K, X)
Ciphertext
Decryption algorithm: X = D(K, Y)
Plaintext output
uses same key (symmetric)
classic model
Attacking Crypto System
Cryptanalysis
Brute-force attack
A...
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