Question

Simplified DES

Describe in detail the encryption and decryption process for Simplified DES by showing your results at each step. Input:

10 bit key = 1 1 1 1 1 0 0 0 0 0 and 8 bit plaintext = 1 1 1 1 1 1 1 1

Details of the key generation process:

K1 = K2 =

Details of encryption process:

Output from IP = Output from first Fk using K1 =

Output from SW = Output from first Fk using K2 =

Output from IP-1 =

Answer 1

ANSWER :

k1 and k2 is generated using the left shift and P8 rules.

The bellow image shoes the generation of keys.

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