ssh-agent tickets expiry?

[Paul Reilly]

Hi,

I'm wondering if it's possible to get ssh-agent to "forget" the keys it
holds after a certain time? ie, I'd like to have a time-lease based system
whereby I can run a script which establishes a trust relationship between
two machines for a set period of time, say 5 mins. But after
this time to expire, so that the machines no longer trust each other.
I know this is possible with kerberos, but is there any way to do it with
openssh / ssh-agent?

Thanks

Paul