full-disclosure - Re: Expired certificate

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Date: Fri, 16 Jul 2010 20:06:24 +0200
From: Dimitry Andric <dimitry@...ric.com>
To: Larry Seltzer <larry@...ryseltzer.com>
Cc: full-disclosure@...ts.grok.org.uk, Daniel Sichel <daniels@...derosatel.com>
Subject: Re: Expired certificate

On 2010-07-16 19:15, Larry Seltzer wrote:
> Certificates have expiration dates so that the verification that happens
> at the time the cert is acquired can have some "freshness."

That is definitely not the only reason.  The longer a certificate (or
actually, any 'secret key') is being used, the larger the probability
that it will be compromised, either by an opponent brute-forcing it, or
by good ole' human error.

Another reason is, of course, to guarantee steady income for the
certificate vendors... ;)

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