Ask HN:Plausibly deniable email
dxjones: Your deniability will not be "plausible" if the two-message feature you described is in the software documentation.At least with disk encryption, you could claim the rest of the disk is "unused".  With email, your encrypted message would be twice as big as necessary for sending your "phoney" message, ... making it clear there is still a "private" message in there.Besides an academic curiosity in encryption, what makes an impressionable young man paranoid these days??