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Re: Spinners and compression functions

To: [email protected]
Subject: Re: Spinners and compression functions
From: "Perry E. Metzger" <[email protected]>
Date: Sat, 06 Apr 1996 11:26:03 -0500
cc: [email protected]
In-reply-to: Your message of "Fri, 05 Apr 1996 21:07:16 EST." <[email protected]>
Reply-To: [email protected]
Sender: [email protected]


[email protected] writes:
> Since there has been a lot of discussion about spinners derived from various
> things (idle loops, video retrace, etc.) used as entropy sources, here is yet
> another idea.  Run the spinner output through a PKZip type compression
> function, and then seed a PRNG with the output from that.  This would provide
> a means of gauging the amount of entropy that has been fed into the PRNG,
> (count the bytes output from the compression function)

Actually, it doesn't. The entropy present from a reasonable source
like keyclick timings is much much lower than the output of pkzip is
going to suggest to you.

Perry

References:
- Spinners and compression functions
  - From: [email protected]

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