The Edward Snowden guide to practical privacy (via ElReg).
Not bad as security advice goes.
Didn't know about SecureDrop nor Qubes (the project lead seems paranoid enough to trust them with writing security software :-) ).
The idea behind its design is that passphrase memorized by the user, along with their email address, can act as a complete, portable basis for a persistent public key identity and provide a full substitute for other key pair models, such as having the key pair stored on disk media (the PGP approach).The only downside I see, is that since persistent private key is replaced with the email+passphrase combination, the passphrase needs to be really good, which is going to be bit of a pain for users. In exchange for that you get two advantages: 1) you don't need to carry with you and protect the private key 2) you don't need to explain to the user how public key cryptography works.