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From Will Nordmeyer <quark...@gmail.com>
Subject Re: Recognizing certificate removal (SmartCard)
Date Wed, 05 Dec 2012 12:33:03 GMT
On Tue, Dec 4, 2012 at 3:07 PM, Christopher Schultz
<chris@christopherschultz.net> wrote:
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> Will,
>
> On 12/4/12 2:47 PM, Will Nordmeyer wrote:
>> Thanks for the quick response and the thoughts.  a 5 minute
>> timeout wouldn't be acceptable in our environment - theory being,
>> if user A pulls his smart card out (but didn't log out of the app),
>> and user B goes up to the machine within 5 minutes, he may have
>> access to someone else's account in the application.  So I was
>> really hoping there was some way to trigger the session to expire.
>
> The only thing I can think of would be to have the web browser
> complicit in the deal: if the browser can be configured to expire the
> SSL session when the card is removed, then that is really the only
> solution that will be truly secure.
>
That's a potential, but there are quite a few clients so I'm not sure
we can impact the clients...  interesting scenario we've got.

>> I'll keep looking, or suggest to my dev team that they write a
>> little app that queries the card regularly and as soon as the card
>> can't be found, logs out.
>
> Is it a valid use case to have the computer itself logged-in when the
> card is removed? For instance, if you configured the machine to
> auto-lock when the card was removed, then you might be able to do
> other things, too (like kill the browser, which should kill the SSL
> session).
>
Oddly enough, yes, it is a valid use case.  we have specific scenarios
where there are common use PCs that have a generic ID logged in, but
they use their CAC and the browser to access the web application.



> - -chris
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