From oito@purdue.edu Wed Oct 11 08:55:30 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!purdue!oito From: oito@purdue.edu (Olga Ito) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Oct11.085530.5575@purdue.edu> Date: Wed, 11 Oct 1995 08:55:30 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 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. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Olga Ito | oito@purdue.edu PGP Key fingerprint: F075 2F96 12DC 0068 "Keep the channels open." From aokonkwo@cmu.edu Thu Oct 12 06:38:30 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!aokonkwo From: aokonkwo@cmu.edu (Anton Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Oct12.063830.5117@cmu.edu> Date: Thu, 12 Oct 1995 06:38:30 GMT References: <1995Oct11.085530.5575@purdue.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct11.085530.5575@purdue.edu>, oito@purdue.edu (Olga Ito) 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. -- Anton Okonkwo | aokonkwo@cmu.edu PGP Key fingerprint: A32D 59DD E4B5 3885 "Keep the channels open." From esouza@cam.ac.uk Fri Oct 13 21:55:30 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!esouza From: esouza@cam.ac.uk (Emi Souza) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Oct13.215530.7676@cam.ac.uk> Date: Fri, 13 Oct 1995 21:55:30 GMT References: <1995Oct11.085530.5575@purdue.edu> <1995Oct12.063830.5117@cmu.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Oct12.063830.5117@cmu.edu>, aokonkwo@cmu.edu (Anton Okonkwo) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Emi Souza Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------ From jpopov@titech.ac.jp Sun Oct 15 07:31:30 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!jpopov From: jpopov@titech.ac.jp (Julien Popov) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Oct15.073130.4283@titech.ac.jp> Date: Sun, 15 Oct 1995 07:31:30 GMT References: <1995Oct11.085530.5575@purdue.edu> <1995Oct12.063830.5117@cmu.edu> <1995Oct13.215530.7676@cam.ac.uk> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct13.215530.7676@cam.ac.uk>, esouza@cam.ac.uk (Emi Souza) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Julien Popov Tape trading list upon request. SASE required for international mail. From ehughes@mindspring.com Mon Oct 16 06:27:30 1995 Path: ashpoly!cascade!brgate!saturno!mindspring!ehughes From: ehughes@mindspring.com (Élodie Hughes) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Oct16.062730.5135@mindspring.com> Date: Mon, 16 Oct 1995 06:27:30 GMT References: <1995Oct11.085530.5575@purdue.edu> <1995Oct12.063830.5117@cmu.edu> <1995Oct13.215530.7676@cam.ac.uk> <1995Oct15.073130.4283@titech.ac.jp> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Oct15.073130.4283@titech.ac.jp>, jpopov@titech.ac.jp (Julien Popov) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- === Élodie Hughes === Dept of Electrical Engineering, MindSpring Enterprises "5 sigma is a discovery. 7 is a question."