If for any reason you come to the attention of some bright hackers, whether by accident or because they are hired by somebody opposing you in a legal venue...you are not going to be safe from tampering. Even PGP which is pretty darn good, can be hacked by somebody really good at the game. Although I have heard that the only folks that can bust it are No Such Agency; I don't really believe that one. I say for really secure communication use a courier. Are you really paranoid now? Sorry, I don't mean to make you just like me. LOL