PRNG design document?

Ben Laurie ben at
Fri Aug 29 06:27:41 EDT 2003

Anton Stiglic wrote:

> ----- Original Message ----- 
> From: "Bob Baldwin PlusFive" <baldwin at>
> To: "Tim Dierks" <tim at>
> Cc: <cryptography at>
> Sent: Friday, August 22, 2003 1:00 PM
> Subject: Re: PRNG design document?
>>     One issue to consider is whether the system
>>that includes the PRNG will ever need a FIPS-140-2
> As you mentioned, the FIPS-140-2 approved PRNG 
> are deterministic, they take a random seed and extend it
> to more random bytes.  But FIPS-140-2 has no 
> provision for generating the seed in the first place, 
> this is where something like Yarrow or the cryptlib
> RNG come in handy.

Actually, FIPS-140 _does_ have provision for seeding, at least for X9.17
(you use the time :-), but not for keying.




"There is no limit to what a man can do or how far he can go if he
doesn't mind who gets the credit." - Robert Woodruff

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