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If the key with parity bit 64 bits is 0123 abcd 2562 1456


Problem

1. If the key with parity bit (64 bits) is 0123 ABCD 2562 1456, find the first round key.

2. Using a plaintext block of all So and a 56-bit key of all So, prove the key-complement weakness assuming that DES is made only of one round.

3. Can you devise a meet-in-the- middle attack for a triple DES?

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Computer Engineering: If the key with parity bit 64 bits is 0123 abcd 2562 1456
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