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Date: Mon, 17 Jun 2013 14:53:28 -0400
From: Jeffrey Walton <noloader@...il.com>
To: Daniël W. Crompton <daniel.crompton@...il.com>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>,
 security@...ossecurity.com
Subject: Re: Microsoft Outlook Vulnerability: S/MIMELossof
	Integrity

On Mon, Jun 17, 2013 at 2:49 PM, Daniël W. Crompton <
daniel.crompton@...il.com> wrote:

>
> how would that work? AKAIK S/MIME is public key cryptography, how would
> you decrypt a message which is not encrypted with your public key?
>

Exactly. How does one decrypt when they don't hold the private key.  That
magic button would come in handy for a lot of folks.

Jeff


On 17 June 2013 20:17, Jeffrey Walton <noloader@...il.com> wrote:

> On Mon, Jun 17, 2013 at 11:19 AM, ACROS Security Lists <lists@...os.si>
> wrote:
> > Valdis,
> >
> >> No, that's how to do it *hardline*.  There's many in the
> >> security industry that will explain to you that it's also
> >> doing it *wrong*.  Hint - the first time that HR sends out a
> >> posting about a 3-day window next week to change your
> >> insurance plan without penalty, signs it with something that
> >> doesn't match the From:, and the help desk is deluged by
> >> phone calls from employees who can't read the mail, the guy
> >> who put "You shall not pass" in place will be starting a job hunt.
> >
> > If there was an industry standard specifying the you-shall-not-pass for
> all web
> > browsers, it wouldn't be the guy (developer) who put this roadblock in
> place that
> > would start a job hunt but someone within the company whose job was to
> avoid the
> > roadblock by making sure the cert that HR is using was okay. That would
> happen a
> > couple of times, and then not any more, as people have great capacity
> for learning.
> >
> > ....
> > ... If I get an encrypted
> > message that was mistakenly not encrypted with my key, it would be very
> productive to
> > have a "Just decrypt anyway" button but we obviously don't have that. ...
> A lot of folks would like to have that button ;)
>

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