From mperez@rwth-aachen.de Wed Aug 28 12:23:18 1996 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!mperez From: mperez@rwth-aachen.de (Min-jun Pérez) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug28.122318.7686@rwth-aachen.de> Date: Wed, 28 Aug 1996 12:23:18 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Did Marcus take the decryption EPROM with him when he left the lab? -- Min-jun Pérez Opinions expressed are solely my own and not those of RWTH Aachen Informatik. ------------------------------------------------------------ From hmoreau@uni-hamburg.de Fri Aug 30 03:15:18 1996 Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!hmoreau From: hmoreau@uni-hamburg.de (Hana Moreau) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug30.031518.8935@uni-hamburg.de> Date: Fri, 30 Aug 1996 03:15:18 GMT References: <1996Aug28.122318.7686@rwth-aachen.de> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Aug28.122318.7686@rwth-aachen.de>, mperez@rwth-aachen.de (Min-jun Pérez) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Hana Moreau -- Universität Hamburg Fachbereich Informatik "The carrier frequency does not drift by accident." From hramirez@unam.mx Sun Sep 01 06:15:18 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!hramirez From: hramirez@unam.mx (Hugo Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Sep01.061518.9053@unam.mx> Date: Sun, 01 Sep 1996 06:15:18 GMT References: <1996Aug28.122318.7686@rwth-aachen.de> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Aug28.122318.7686@rwth-aachen.de>, mperez@rwth-aachen.de (Min-jun Pérez) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Hugo Ramírez Zyxel U-1496E @ 9600 Telebit bps "We don't sign stars. We build them." From cfischer@mit.edu Sun Sep 01 22:50:18 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!cfischer From: cfischer@mit.edu (Callum Fischer) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Sep01.225018.5971@mit.edu> Date: Sun, 01 Sep 1996 22:50:18 GMT References: <1996Aug28.122318.7686@rwth-aachen.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Aug28.122318.7686@rwth-aachen.de>, mperez@rwth-aachen.de (Min-jun Pérez) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. If you are posting from AOL, please read RFC 1036 before posting again. -- Callum Fischer Hayes Optima 288 @ 9600 Telebit bps "Row 14. No joke."