From jpark@pipeline.com Wed Dec 06 04:40:18 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!jpark From: jpark@pipeline.com (Julien Park) Newsgroups: comp.sys.m68k Subject: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Dec06.044018.5025@pipeline.com> Date: Wed, 06 Dec 1995 04:40:18 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Did Marcus take the decryption EPROM with him when he left the lab? -- Julien Park US Robotics Courier V.34 @ 9600 Telebit bps "Extraordinary claims require extraordinary spectra." From ekim@cern.ch Wed Dec 06 09:04:18 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!ekim From: ekim@cern.ch (Élodie Kim) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Dec06.090418.1794@cern.ch> Date: Wed, 06 Dec 1995 09:04:18 GMT References: <1995Dec06.044018.5025@pipeline.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Dec06.044018.5025@pipeline.com>, jpark@pipeline.com (Julien Park) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Élodie Kim *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0