How so? Had they found printed cyphertext in his house, would he be in jail? Or, more cogently, one sheaf of random numbers and one of cyphertext?<p>The point is, the whole &quot;lock&quot; analogy is wrong. Encryption is not an unbreakable lock, nor is it a game-changer. It&#x27;s been there for hundreds of years at least, as long as there have been cyphers.