`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 advancePriya Ainapur

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