WEP cracking with GPU

[skan]

Hello

Could you also add WEP cracking, please?
I know you already offer WPA,
I also know there are other fast tools for WEP cracking,
but i'd like to benchmark the WEP bruteforce cracking with GPU.

Thanks.

[Mem5]

You don't need to bruteforce WEP ! Aircrack-ng already cracks the key.

[bmenrigh]

(03-02-2012 08:43 PM)skan Wrote:  Hello

Could you also add WEP cracking, please?
I know you already offer WPA,
I also know there are other fast tools for WEP cracking,
but i'd like to benchmark the WEP bruteforce cracking with GPU.

Thanks.

WEP cracking is a statistical attack based on the IVs gathered and a flaw in the RC4 key schedule that biases a few bits and causes other key bits to be leaked with some probability. If cracking is taking a lot of processing time you don't have enough IVs collected.

The RC4 key schedule is a data-dependant permutation (and very similar to Fisher–Yates). GPUs are usually poor at array shuffling and data-dependant operations.

I'm not saying Atom CAN'T do it, just that WEP doesn't really beg for GPU acceleration like many other algorithms do.

[skan]

(03-02-2012 09:19 PM)bmenrigh Wrote:  WEP cracking is a statistical attack based on the IVs gathered and a flaw in the RC4 key schedule that biases a few bits and causes other key bits to be leaked with some probability.
...

Hello

I know there exist some statistal WEP cracking methods.
But that methods sometimes fail, even with millions of IVs.
Anyway, some people could find interesting just trying bruteforcing (or dictionary attack) against WEP too, and GPU can help the same way it helps to crack WPA keys.

regards