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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