New entropy source proposal.

Richard Coleman rcoleman at
Tue Mar 8 14:16:30 GMT 2005

Ian G wrote:
> You might want to check out:
> There is some controversy over the new FreeBSD /dev/random system,
> is there any analysis of the system?  I wasn't able to find anything
> from a brief search.
> iang

The FreeBSD /dev/random was originally based on the Yarrow paper that is 
given as a reference in the paper above.  But I think the current 
implementation is more similar to to the version of Yarrow that is 
discussed in Bruce Schneier's "Practical Cryptography".  I'm not sure if 
that is a coincidence or not.

The paper mentioned above only briefly mentions Yarrow, and doesn't 
mention the FreeBSD implementation, so it's hard to compare the two.

At first glance, both systems appear strong.

Richard Coleman
rcoleman at

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