From nchoi@tum.de Thu Aug 15 06:34:31 1996 Path: ashpoly!cascade!bigsur!tum!nchoi From: nchoi@tum.de (Nadine Choi) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug15.063431.2667@tum.de> Date: Thu, 15 Aug 1996 06:34:31 GMT Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Hardware disassembly report for Motorola hardware hackers. 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. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Nadine Choi "There are 14 nodes and only 10 countries. Count again." Macintosh IIfx / SunOS 4.1.4 From jpopov@inria.fr Fri Aug 16 14:27:31 1996 Path: ashpoly!cascade!mxgate!coyoacan!inria!jpopov From: jpopov@inria.fr (Julien Popov) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug16.142731.4280@inria.fr> Date: Fri, 16 Aug 1996 14:27:31 GMT References: <1996Aug15.063431.2667@tum.de> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1996Aug15.063431.2667@tum.de>, nchoi@tum.de (Nadine Choi) writes: > Hardware disassembly report for Motorola hardware hackers. > Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Julien Popov Hayes Optima 288 @ 14,400 bps "When every node is whole, the channel opens."