On the subject of personal encryption I recently found some interesting plausible deniability software [1] in Phrack [2] for protection against "give us the password or you're going to jail" laws

Different passwords decrypt different plaintext from the same cyphertext

[1] http://www.winstonsmith.info/julia/elettra/ [2] http://phrack.org/issues.html?issue=65&id=6#article