full-disclosure - Re: Expired certificate

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Date: Thu, 22 Jul 2010 17:41:35 -0700
From: Ryan Castellucci <ryan.castellucci@...il.com>
To: Dimitry Andric <dimitry@...ric.com>
Cc: full-disclosure@...ts.grok.org.uk, Daniel Sichel <daniels@...derosatel.com>
Subject: Re: Expired certificate

On Fri, Jul 16, 2010 at 11:06 AM, Dimitry Andric <dimitry@...ric.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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