[22c]

The problem with your scenario is that the recipient of the payload is not trustworthy.

Instead of the recipient being your partner, it should be a trusted 3rd party who could be instructed to provide the key to your partner in the event of your death (it would then be up to that 3rd party to verify that you are in fact dead). You could also add all kinds of caveats here like the 3rd party should only provide the key to your partner if your death wasn't suspicious etc.

Essentially, the recipient of the key needs to be trusted. Hopefully someone who cares about YOUR legacy, not lining their pockets with whatever the contents of your sarcophagus might reveal.

You can't assume everyone is a bad actor, otherwise everyone would be murdering their parents :)

[theamk]

But if there is a trusted 3rd party, why would I need that whole sarcophagus system? Let's just cut out the extra step and give the key to 3rd party directly. May buy that safe deposit box at the bank, it is pretty cheap.

The whole premise of decentralized system is there is no need for trusted third parties.