Quote from: FUEPA on November 03, 2013, 08:46:31 PM

create an offline TX ready to broadcast to an address you already own, and give it to a trusted friend. I don't understand the particulars, but it shouldn't involve private keys, but public information - correct?

If the authorities wish to seize, your friend broadcasts the tx while you claim you gave the private key to officer Smith while in custody.

...

Quote from: Kouye on November 03, 2013, 05:40:42 PM

Quote from: eoJ on November 03, 2013, 04:24:24 PM

Easy, something like twilio to grab all SMS messages, and react on either any message being sent, or a specific message being sent. I guarantee you someone in jail can find a way for someone to send a text.

Looks like you didn't read OP carefully.

Quote from: Kouye on November 03, 2013, 01:23:40 PM

I know there are already a nice set of solutions, which include at least:
[...]
- Pre-signed transaction "bombs" that an accomplice can trigger on a "jailed man switch".

Any idea that does not implicate a "trusted 3rd party", now ?
Just you, your fat wallet, and some people determined to gain access to said wallet.

Quote from: agent007 on November 03, 2013, 08:26:34 PM

Quote from: Kouye on November 03, 2013, 01:23:40 PM

After the last seizures of "wallets" from authorities, I have been wondering about how to prevent them from extracting the passphrase through chemicals and/or torture.

I know there are already a nice set of solutions, which include at least:
- Multi-signing
- Hidden cold wallets
- Pre-signed transaction "bombs" that an accomplice can trigger on a "jailed man switch".

Can you explain me more detailed ?
My boss wants to know more about this methods.

Lurk more, this is supposed to be a serious thread.