From asokolov@berkeley.edu Fri Feb 17 23:12:38 1995 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!asokolov From: asokolov@berkeley.edu (Amy Sokolov) Newsgroups: comp.sys.m68k Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Feb17.231238.8900@berkeley.edu> Date: Fri, 17 Feb 1995 23:12:38 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Hardware disassembly report for Motorola hardware hackers. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Amy Sokolov | asokolov@berkeley.edu PGP Key fingerprint: F596 99A2 B144 2C29 "Keep the channels open." From mgirard@pacbell.net Sat Feb 18 15:49:38 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!mgirard From: mgirard@pacbell.net (Morag Girard) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Feb18.154938.8000@pacbell.net> Date: Sat, 18 Feb 1995 15:49:38 GMT References: <1995Feb17.231238.8900@berkeley.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Feb17.231238.8900@berkeley.edu>, asokolov@berkeley.edu (Amy Sokolov) writes: > Hardware disassembly report for Motorola hardware hackers. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Morag Girard Practical Peripherals 14.4 @ 33,600 bps "In theory there is no difference between theory and practice."