Tagged Questions
10
votes
2answers
1k views
Why is MixColumns omitted from the last round of AES?
All rounds of AES (and Rijndael) have a MixColumns step, save the last round which omits it. DES has a similar feature where the last round differs slightly. The rationale, if I recall correctly, ...
10
votes
2answers
3k views
How long does it take to crack DES and AES?
Suppose that a single evaluation of a block-cipher (DES or AES) takes 10 operations, and the computer can do $10^{15}$ such operations per second.
How long would it take for to recover a DES key, ...
5
votes
3answers
1k views
Is there any opensource white-box implementation of AES or DES?
I googled it and give me no result. There is a binary executable of white-box implementation of DES (scroll down), but no source code provided.
The same page also links various papers about ...
