content: I don't think telling a judge your pc is a random number generator or a numbers station is going to work out too well.  They'll seriously just say you have cp on there, keep you locked up until you give them the decryption key and then let it slip to the other inmates why they believe you're in there without mentioning it's just an encryption issue.  The fear of rape and murder is a very real motivator and they use it routinely.