Understanding Cryptography by Christof Paar and Jan Pelzl - Chapter 3 Solutions - Ex3.1

- 1 min

Exercise 3.1

As stated in Sect. 3.5.2, one important property which makes DES secure is that the S-boxes are nonlinear. In this problem we verify this property by computing the output of S1 for several pairs of inputs.

Show that , where “” denotes bitwise XOR, for:

  1.  
  2.  
  3.  

Solution

This solution is verified as correct by the official Solutions for Odd-Numbered Questions manual.

1.

2.

3.


Thomas Busby

Thomas Busby

I write about computing stuff

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