Understanding Cryptography by Christof Paar and Jan Pelzl - Chapter 3 Solutions - Ex3.2

- 1 min

Exercise 3.2

We want to verify that and are truly inverse operations. We consider a vector of 64 bit.

Show that for the first five bits of , i.e. for .

Solution

I haven’t yet verified this solution independently. If you spot any mistakes, please leave a comment in the Disqus box at the bottom of the page.

The easiest way to demonstrate this is to create a table that shows which location each bit gets mapped to after each operation:


Thomas Busby

Thomas Busby

I write about computing stuff

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