Re: key material

[Peter Conrad <conrad () tivano de>]

Hi,

On Thu, Apr 22, 2004 at 11:29:36AM -0600, Greg Kilford wrote:
> I was juz discussing with my pals the other day on the appropriate initial 
> input bit size to seed a PRNG of the structure below for it to be used to 
> generate the random bits for RSA key material of modulus 1024 bits or 2048 
> bits.  Anyone know what would be the ideal length/size of A so that there 
> is sufficient entropy to generate the key material for RSA 1024/2048 bits 
> keys?

that'll depend on how you use the output of the PRNG to generate an RSA key.
As a general rule I'd say A should have one bit of entropy for every bit
of O that you use. You didn't tell us anything about how A is constructed,
so we can't say how long it should be.

Bye,
        Peter
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