About AES Based PRNG

[Alec]

Hi,

I have a question about AES Based PRNG.
I choose AES Based PRNG for CI+ random numbers.
Therefore I implement codes as Figure A.1: AES Based PRNG Example.
From the spec Page.144,
In Figure A.1, k is a 128-bit constant value, DTi is a 128 bit value that is updated on each iteration (e.g. date/time vector
or monotonic counter) and s is a seed value.
NOTE: Unless explicitly noted otherwise, the values k and S shall be treated as highly confidential as described
in the license agreement.

The S can be "prng_seed".
How about k? How could I get it?
If I have incorrect concept, please let me know.

Thanks for your kind help in advance!

Best Regards,
Alec

[Mahendiran]

Hi..
Now we are in the implememtation of CI+. Can you help me to get AES based PRNG. What should be the seed value. Is that PRNG is depends on the seed? Please let me know the detalis.


Best Regards,
Mahendiran.

[jensk]

I believe what you are looking for is explained in "CI Plus License Specification for Host Manufacturers", which you get with the test material when you sign then Interim License Agreement.