I think that when we were using the decoder ring, there was a particular "Key" to each puzzle tht had to be solved in order to decode the message. Each key was different and it required some sleuthing to figure it out.
So if you were using the decoder ring to encrypt a message, you would have to make a key. We could use one of Tachy's key's, but maybe you would have to find a way to let him know which key you were using? Otherwise he wouldn't be able to decode the message!
Does that make any sense? Sometimes I'm not good at explaining what I'm thinking.
