offline address - or a way to explicitly freeze an address

[casascius]

No matter how you cut it though, if you have a time-locked address, the bad guy has just as much chance of being the person to get the coins the minute the time runs out as the good guy, possibly even more so if the good guy is in a vulnerable position.

[btcusr]

I think, "time-based lock" is different from "frozen".

"time-based lock" is for predefined time, "freezing" is adhoc.

compromised "time-based lock" address, has no protection.
when in doubt, "frozen" addresses can be unlocked, and then locked with new "freeze" key.

[DannyHamilton]

when in doubt, "frozen" addresses can be unlocked, and then locked with new "freeze" key.

You keep saying this.  I give up.

[btcusr]

when in doubt, "frozen" addresses can be unlocked, and then locked with new "freeze" key.

You keep saying this.  I give up.

easy for you, I can't do that. 

I still have to go a long way to answer questions like,
whether this can be implemented?
can I do this?
will this ever be released?

[Timo Y]

No matter how you cut it though, if you have a time-locked address, the bad guy has just as much chance of being the person to get the coins the minute the time runs out as the good guy, possibly even more so if the good guy is in a vulnerable position.

True. But my idea is to use the time lock as an additional security feature on top of already existing security features, such as offline wallets and multisig.

Instead of using time locks that expire on a fixed date, I would suggest using 'ratchet' time locks where the expiry date can be postponed indefinitely by the owner of the address.

[btcusr]

Instead of using time locks that expire on a fixed date, I would suggest using 'ratchet' time locks where the expiry date can be postponed indefinitely by the owner of the address.

so, someone gets they key can extend the lock and prevent you from spending.

how you could postpone a time lock? through a new transaction?

[Dabs]

I still have to go a long way to answer questions like,
whether this can be implemented?
can I do this?
will this ever be released?

1. Probably can not be implemented.
2. Probably no easy way to do it yourself without changing the protocol. It could be client dependent.
3. Probably not ever be released.