Say - why is it cypherpunks instead of cipherpunks? - its hard to remember! Unicorn> I would like someone with enough technical background to design and build a prototype IDEA/DES/RSA device suitable for voice encryption using modular phone jacks and plugs. Well now, I do that for a living. It isn't exactly cheap. The phone jack would probably be to a high speed modem, 14,400 or higher. The other side would be to a E&M (4 wire) jack attached to a handset. The rest is just an AtoD and DtoA converter and amps, probably with a compander, try intel 29xx chips. This gives a 64kbps full duplex data stream that needs compressed to the modem speed, probably with LPC - linear predictive coding. The DES or IDEA would need to operate at modem speeds - full duplex. How much you want to pay? Peace