The Wall Street Journal, 7 June 93, page B7, has an AT&T ad for an encrypting communications box called "Surity Telephone Device". It plugs between a regular phone and the phone jack. Anybody know what's inside? Is this new?
The box pictured is the Clipper-based successor to the AT&T 3600 secure phone. They have a "bump in the cord" architecture; in the case of the 3600, it plugged between the handset and the phone. This is a pain in the ass (there are six or seven "handset modules" that plug into the unit, and you have to use one to match your phone -- or get several and pray that one will match each phone you ever want to use.) We played with one of the 3600's at a Bay Area cypherpunks meeting a few months ago. I'd refer to the "Surity" as the "surly telephone device". John