Quality of PRNGD
Thu Sep 13 15:29:01 2001
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At 10:00 AM +0200 9/13/01, Werner Koch wrote:
>On Wed, 12 Sep 2001 16:52:21 -0400, Gordon Worley said:
>> Recently someone made me aware of PRNGD. The Web site claims that it
>> is better than EGD and gives reasons. I was wondering if anyone else
>> here had used it and the quality of the RNG (realizing, of course,
>There is a huge difference between a RNG and a PRNG. If you ever get
>hands on on (internal) state of the PRNG you can recompute all pother
>states and predict the random numbers given. For certain algorithms
>you definitely want better unpredictable random.
>And EGD has to block if it seems that there is not enough entroy in
Okay, but, if I understand correctly, EGD is also a PRNG, or maybe
I'm missing something? And, yes, from what I can tell EGD blocking
is, for sure, a good thing in terms of gathering entropy, even though
I guess in openssh it's not (I've been pointed at some discussion
they've had about this).
Put, putting my misuse of terminology aside, I guess what you're
saying is that EGD is better suited for use with GnuPG than PRNGD is,
even if EGD could use an improvement or two from what the PRNGD
documentation is claiming about EGD basically failing to look at
sources of entropy anymore (but I'm guessing in those cases it
completely blocks, or so I hope).
Gordon Worley `When I use a word,' Humpty Dumpty
http://www.rbisland.cx/ said, `it means just what I choose
email@example.com it to mean--neither more nor less.'
PGP: 0xBBD3B003 --Lewis Carroll
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