Friday, April 1, 2022

Computer Science | Question in description | Question 12

Consider the following symmetric block encryption algorithm in which 64-bit blocks of plaintext are encrypted using a 128-bit key. Encryption is defined as:

Consider the following symmetric block encryption algorithm in which 64-bit blocks of plaintext are encrypted using a 128-bit key. Encryption is defined as:

C is the ciphertext, K is the secret key, K0 is the leftmost 64 bits of K, K, is the rightmost 64 bits of K, is bitwise exclusive OR, and 0 is addition mod 264. Show the decryption equation. How will the encrypted message be decrypted?



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