Yep. And this layered encryption is great because it allows — for example — your phone to boot up before you enter a passphrase. Making this technology more co

Yep. And this layered encryption is great because it allows — for example — your phone to boot up before you enter a passphrase. Making this technology more convenient is just as important for making people secure as the algorithms themselves, because otherwise, almost no one will use them (PGP-encrypted email being the classic example).