Google Answers: Cryptography homework problems

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Q: Cryptography homework problems ( No Answer, 0 Comments )

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Subject: Cryptography homework problems
Category: Computers > Security
Asked by: oubehave003-ga
List Price: $25.00

Posted: 18 Oct 2004 22:05 PDT
Expires: 19 Oct 2004 21:57 PDT
Question ID: 416842

I'm trying to figure out how to do the below 2 homework problems.  Any
help would be appreciated:

1.  For each of the 8 DES S-boxes, compute the bias of the random variable:
                              X2 xor Y1 xor Y2 xor Y3 xor Y4

2.  Given AES running with 128 bit keys, assume that the initial Key
value is all zeroes:

    K[0] = 00000000000000000000000000000000Hex.

Calculate the Round 1 Key.

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