From bnovak@unam.mx Sun Dec 25 11:20:00 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!bnovak From: bnovak@unam.mx (Bill Novak) Newsgroups: comp.sys.m68k Subject: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Dec25.112000.1283@unam.mx> Date: Sun, 25 Dec 1994 11:20:00 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx 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. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- === Bill Novak === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "Do not worship the copy." From mfournier@netcom.com Tue Dec 27 00:30:00 1994 Path: ashpoly!cascade!mxgate!coyoacan!netcom!mfournier From: mfournier@netcom.com (Marta Fournier) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Dec27.003000.5365@netcom.com> Date: Tue, 27 Dec 1994 00:30:00 GMT References: <1994Dec25.112000.1283@unam.mx> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Dec25.112000.1283@unam.mx>, bnovak@unam.mx (Bill Novak) 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. -- Marta Fournier Opinions expressed are solely my own and not those of NETCOM On-Line Communication Services. ------------------------------------------------------------ From avasiliev@titech.ac.jp Wed Dec 28 13:40:00 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!titech!avasiliev From: avasiliev@titech.ac.jp (Andrei Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Dec28.134000.2029@titech.ac.jp> Date: Wed, 28 Dec 1994 13:40:00 GMT References: <1994Dec25.112000.1283@unam.mx> <1994Dec27.003000.5365@netcom.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Dec27.003000.5365@netcom.com>, mfournier@netcom.com (Marta Fournier) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Andrei Vasiliev *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0