From tpetrov@unam.mx Mon Sep 12 23:22:00 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!tpetrov From: tpetrov@unam.mx (Tobias Petrov) Newsgroups: comp.sys.m68k Subject: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep12.232200.9932@unam.mx> Date: Mon, 12 Sep 1994 23:22:00 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N 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. 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'? -- Tobias Petrov SupraFAXModem 28.8 @ 33,600 bps "The carrier frequency does not drift by accident." From lbrennan@demon.co.uk Tue Sep 13 11:18:00 1994 Path: ashpoly!cascade!brgate!saturno!demon!lbrennan From: lbrennan@demon.co.uk (Liam Brennan) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep13.111800.5559@demon.co.uk> Date: Tue, 13 Sep 1994 11:18:00 GMT References: <1994Sep12.232200.9932@unam.mx> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Sep12.232200.9932@unam.mx>, tpetrov@unam.mx (Tobias Petrov) writes: > Hardware disassembly report for Motorola hardware hackers. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Liam Brennan | lbrennan@demon.co.uk PGP Key fingerprint: 3279 7005 4043 5220 "Keep the channels open." From sandersson@mit.edu Thu Sep 15 11:05:00 1994 Path: ashpoly!cascade!bigsur!mit!sandersson From: sandersson@mit.edu (Sun-mi Andersson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep15.110500.5298@mit.edu> Date: Thu, 15 Sep 1994 11:05:00 GMT References: <1994Sep12.232200.9932@unam.mx> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Sep12.232200.9932@unam.mx>, tpetrov@unam.mx (Tobias Petrov) 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. -- Sun-mi Andersson SupraFAXModem 28.8 @ ISDN 64k bps "There are 14 nodes and only 10 countries. Count again." From lpopov@cmu.edu Fri Sep 16 16:44:00 1994 Path: ashpoly!cascade!bigsur!cmu!lpopov From: lpopov@cmu.edu (Lars Popov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep16.164400.3088@cmu.edu> Date: Fri, 16 Sep 1994 16:44:00 GMT References: <1994Sep12.232200.9932@unam.mx> <1994Sep15.110500.5298@mit.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Sep15.110500.5298@mit.edu>, sandersson@mit.edu (Sun-mi Andersson) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Lars Popov | lpopov@cmu.edu PGP Key fingerprint: E057 C82C 0A3A 63CD "Keep the channels open." From ssato@hanse.de Sat Sep 17 01:00:00 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!hanse!ssato From: ssato@hanse.de (Sun-mi Sato) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep17.010000.6134@hanse.de> Date: Sat, 17 Sep 1994 01:00:00 GMT References: <1994Sep12.232200.9932@unam.mx> <1994Sep15.110500.5298@mit.edu> <1994Sep16.164400.3088@cmu.edu> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Sep16.164400.3088@cmu.edu>, lpopov@cmu.edu (Lars Popov) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Sun-mi Sato | ssato@hanse.de PGP Key fingerprint: F4D0 6F9C 527F D7FC "Keep the channels open."