From: Peter Conrad <conrad () tivano de>
To: webappsec () securityfocus com
Subject: Re: key material
Date: Fri, 23 Apr 2004 10:05:23 +0200
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
--
Peter Conrad Tel: +49 6102 / 80 99 072
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