RNG using AES CTR as encryption algorithm

David Johnston dj at deadhat.com
Fri Sep 4 23:57:30 EDT 2009


NIST doesn't provide specific KAT vectors for AES-CTR because the 
results depend on your specific counter construction.
When you interact with a FIPS test lab, you will provide them with your 
counter construction, they will provide you with the KATs and you will 
then test to those KATs.

This is probably why you are not finding AES-CTR vectors in the same 
places you might find AES-CBC vectors. NIST explains this somewhere in 
their publications.

Convincing yourself that you have implemented AES-CTR correctly usually 
involves first checking that your AES-ECB is correct, then putting the 
output of you counter construction into some other known good AES-CTR 
implementation and comparing the results with your implementation.

Regards,
DJ

priya yelgar wrote:
> Hi all,
>
> I have implemented RNG using AES algorithm in CTR mode.
>
> To test my implementation I needed some test vectors.
>
> How ever I searched on the CSRC site, but found the test vectors for AES_CBC not for AES CTR.
>
> Please  can any one tell me where to look for the test vectors to test RNG using  AES CTR.
>
>
> Thanks in advance 
> Priya Ainapur
>
>   

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