On Sat, 25 Sep 1993 12:17:32 -0700 (MDT), <uunet!VIS.ColoState.EDU!nate> wrote -

I seem to remember there being a picture of the clipper chip in Popular Science or something.... does anyone remember where this picture is?

I know this is not what you're looking for, but I'm in a very strange mood today: Date: Mon, 19 Apr 93 9:21:53 EDT Organization: FIRST, The Forum of Incident Response & Security Teams Subject: Slide presented at White House briefing on Clipper Chip Note: The following material was handed out a press briefing on the Clipper Chip on 4/16. Chip Operation Microchip User's Message +----------------------+ ------------------> | | 1. Message encrypted | Encryption Algorithm | with user's key | | | Serial # | 2. User's key encrypted | |--> with chip unique key | Chip Unique Key | User's Encryption | | 3. Serial # encrypted Key | Chip Family Key | with chip family key ------------------> | | | | +----------------------+ For Law Enforcement to Read a Suspect's Message 1. Need to obtain court authorized warrant to tap the suspect's telephone. 2. Record encrypted message 3. Use chip family key to decrypt chip serial number 4. Take this serial number *and* court order to custodians of disks A and B 5. Add the A and B components for that serial number = the chip unique key for the suspect user 6. Use this key to decrypt the user's message key for this recorded message 7. Finally, use this message key to decrypt the recorded message.