Full Disclosure mailing list archives

Re: Expired certificate


From: Ryan Castellucci <ryan.castellucci () gmail com>
Date: Thu, 22 Jul 2010 17:41:35 -0700

On Fri, Jul 16, 2010 at 11:06 AM, Dimitry Andric <dimitry () andric com> wrote:
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.

Except that there's nothing that makes you change out the private key
when the cert expires.  As far as I've seen, the cert vendors will just let
you renew your certificate for the same private key.

-- 
Ryan Castellucci http://ryanc.org/

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