Here's a cryptanalysis of EMF for anyone that cares; you need one known plaintext to break the system:
http://home.datawest.net/staym/emf.html

Nice job on EMF

But the more important question is; Since giving your wife that bracelet, (http://home.datawest.net/staym/ring.jpg) do you ever hear her mumbling "my precious" ?

radiant

It was for my sister. I wrote on the card "This present is broken (or rather, it never worked to begin with), which is probably a good thing..."