Yeah, sorry about that. I am referring to bruce Schneier's book. I haven't had the opportunity to read it yet, but from the looks of it, it will be helpful in future projects.

I'm not familiar with the term "linear feedback shift register stream ciper", but that gives me an avenue to research.

My application's security isn't uber-important. It's your typical average consumer application...no scud missles :) I guess I would classify the encryption level necessary as wanting to prevent peeping tom from spying the serial traffic, but probably not protect against physical type means.

James