From: wcs@anchor.ho.att.com (bill.stewart@pleasantonca.ncr.com +1-510-484-6204)
Date: Sun, 17 Apr 94 21:10:58 PDT
To: cypherpunks@toad.com
Subject: Re:  rng, anyone?
Message-ID: <9404180409.AA16376@anchor.ho.att.com>
MIME-Version: 1.0
Content-Type: text/plain


Eric et al write:
> >> There is a problem with generating random numbers by repeated
> >> iterations of a hash function when these numbers will be used to
> >> simulate an encrypted message body.  
> >Try xoring the output with a secret value between MD5 hashes.
> That'll work.  Take the seed as the secret value, and take the first
> hash as the first block.

Or you can delete some bits from the MD5, or, since MD5 takes more input
than it gives output, append a secret value to the MD5 before rehashing.