RE: Cookies as the second factor

["Randy Ollett" <Randy.Ollett () ama-assn org>]

Jeff, I think you have it correct - cookies are used to maintain a
relationship that could be established via connecting free and clear,
single factor, or multi-factor.  They are operational "mechanisms"
helpful in maintaining a connection between two points.

Two factor authentication refers to initial connection, where you
require you use two of the following three "factors" - something you
know, something you have or something you are.  Cookies help maintain
the connection.  

Thank you.
Randy Ollett
American Medical Association
312-464-4963
randy.ollett () ama-assn org

-----Original Message-----
From: Robin Wood [mailto:dninja () gmail com] 
Sent: Tuesday, July 18, 2006 10:03 AM
To: discard () dawes za net
Cc: Jeff Robertson; webappsec () securityfocus com
Subject: Re: Cookies as the second factor

Javascript could be used to generate the cookie which is then passed
back to the server with each request. This would save having to make
sure a value was posted or passed on the query string on each request.

Don't have time to think about how good this would be for
authentication but I think techincally it can be done.

Robin

On 7/18/06, Rogan Dawes <discard () dawes za net> wrote:
> Jeff Robertson wrote:
> > It seems like it's been mentioned on here before, that a number of
"two
> > factor" or "multi factor" authentication schemes actually use a
cookie
> > as the second factor.
> >
> > Anyone here have specific experience with such solutions, or
opinions
> > about how much security they add to a system?
>
> Sounds completely bogus to me.
>
> The cookie is typically generated by the server, as a response to an
> authentication event (single or multi-factor). The cookie is then used
> to maintain that authentication from request to request.
>
> There is NO authentication component in such a cookie. It is created
by
> the SERVER, and as such CANNOT qualify as an authentication factor at
all.
> Rogan
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