I have two questions around a recent post on the secure key and June 2011
1) if this date is missed is there now way to apply this fix and continue patching?
2) What exactly does the secure key do?
Patches and packages are digitally signed.
Probably this extend the time validity of the sign or simple add new public key for the sign verification.
Could be the same as the web certificates where you sometime have to to renew the public CA list.