[eru]

You can use a threshold secret sharing scheme to distribute your keys amongst your friends (and amongst companies).

This way you don't need to trust any single one of your friends to be 100% honest nor 100% available.

[littlestymaar]

I know how to do that in theory (I've worked with Shamir secret sharing on elliptic curves before) but you don't have the option to do that in LUKS, so in practice you can't use it.

[pydry]

Thats kind of my point.

you could rsync files before you could Dropbox too, but there was still a need for a Dropbox.