[thegenius]

while the idea has merits, i would not trust you with my most sensitive data (especially if it is reversibly encrypted or plaintext), i would feel like i was paying for an added secuirty risk, of which there are too many already. also it doesnt seem like there are assurances against you abusing my data like there would be if you were a lawyer i had entrusted to execute my will. there's no personal relationship there, so i don't feel comfortable.

[MichaelGG]

They should implement some shared key encryption for you. But I'm not sure if any systems provide building blocks. For instance, does FB login have any API for encrypting data?

The secrets they store should be offline and require manual intervention to retrieve.

Also, what's to stop a false triggering? It should require confirmation from m of n sources you specify. If I had some serious life secrets, I'd want to be very sure they don't get sent out just because I'm in a coma for a month.