[76602] in cryptography@c2.net mail archive
Re: Private Key Generation from Passwords/phrases
daemon@ATHENA.MIT.EDU (Perry E. Metzger)
Thu Jan 18 17:17:41 2007
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
To: John Denker <jsd@av8n.com>
Cc: David Wagner <daw@cs.berkeley.edu>, cryptography@metzdowd.com
From: "Perry E. Metzger" <perry@piermont.com>
Date: Thu, 18 Jan 2007 17:13:26 -0500
In-Reply-To: <45AFECE4.9020305@av8n.com> (John Denker's message of "Thu, 18 Jan 2007 16:55:48 -0500")
John Denker <jsd@av8n.com> writes:
> There is only one technical definition of entropy,
Oh?
So you're saying Chaitin-Kolmogrov information and other ways of
studying entropy are "wrong"? I think that's a bit unreasonable, don't
you?
There are different definitions that are useful at different
times. Fundamentally, mathematics provides us with models, which are
sometimes applicable to a particular practical problem, and sometimes
are not applicable. It is dangerous to forget that. When you do, you
get things like "proofs of security" based on inapplicable models, and
worse.
Perry
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