This appears to be the device in question: http://www.cryptomuseum.com/crypto/att/tsd3600/ http://www.cryptomuseum.com/crypto/att/tsd3600/ The variant the aut

This appears to be the device in question: http://www.cryptomuseum.com/crypto/att/tsd3600/ http://www.cryptomuseum.com/crypto/att/tsd3600/ The variant the author carried is described as "developed for export purposes. It used a 'weak' cipher algorithm with a 40-bit key." Should you feel the need, you can buy the E variant - "the first model with the ill-fated Clipper Chip inside" - for the low, low price of $60 here: http://www.dutchguard.com/ATT-TSD-3600-telephone-security-device-p-persec.html http://www.dutchguard.com/ATT-TSD-3600-telephone-security-de...