Hmm I don't like the idea of involving a third (untrusted party) with what could be basically the key to your whole online identity. I would love to see a system which allows your heirs to access online accounts without having to fear that a simple government request will hand them everything they need on a silver plate (including stuff not obviously related to you). Probably physical objects need to be involved (cod…
I coded something like this myself a while ago. You can run it on a server or a local computer. The data is encrypted, no need to trust third parties: