From slopez@delphi.com Sun Jan 08 20:13:20 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!delphi!slopez From: slopez@delphi.com (Steve López) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan08.201320.8975@delphi.com> Date: Sun, 08 Jan 1995 20:13:20 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Hardware disassembly report for Motorola hardware hackers. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Steve López -- Delphi Internet Services "There are 14 nodes and only 10 countries. Count again." From ysato@earthlink.net Mon Jan 09 06:46:20 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!ysato From: ysato@earthlink.net (Yuki Sato) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan09.064620.9756@earthlink.net> Date: Mon, 09 Jan 1995 06:46:20 GMT References: <1995Jan08.201320.8975@delphi.com> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jan08.201320.8975@delphi.com>, slopez@delphi.com (Steve López) 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. -- Yuki Sato Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------ From hwatanabe@demon.co.uk Wed Jan 11 08:47:20 1995 Path: ashpoly!cascade!bigsur!demon!hwatanabe From: hwatanabe@demon.co.uk (Hana Watanabe) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan11.084720.4246@demon.co.uk> Date: Wed, 11 Jan 1995 08:47:20 GMT References: <1995Jan08.201320.8975@delphi.com> <1995Jan09.064620.9756@earthlink.net> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan09.064620.9756@earthlink.net>, ysato@earthlink.net (Yuki Sato) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- === Hana Watanabe === Dept of Electrical Engineering, Demon Internet Services UK "We don't sign stars. We build them." From lstewart@pacbell.net Thu Jan 12 18:32:20 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!lstewart From: lstewart@pacbell.net (Lisa Stewart) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan12.183220.6536@pacbell.net> Date: Thu, 12 Jan 1995 18:32:20 GMT References: <1995Jan08.201320.8975@delphi.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Jan08.201320.8975@delphi.com>, slopez@delphi.com (Steve López) 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! -- Lisa Stewart Tape trading list upon request. SASE required for international mail. From mlindqvist@clari.net Fri Jan 13 17:30:20 1995 Path: ashpoly!cascade!bigsur!clari!mlindqvist From: mlindqvist@clari.net (Marta Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Jan13.173020.9928@clari.net> Date: Fri, 13 Jan 1995 17:30:20 GMT References: <1995Jan08.201320.8975@delphi.com> <1995Jan09.064620.9756@earthlink.net> <1995Jan11.084720.4246@demon.co.uk> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan11.084720.4246@demon.co.uk>, hwatanabe@demon.co.uk (Hana Watanabe) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Marta Lindqvist Practical Peripherals 14.4 @ 9600 Telebit bps "Row 14. No joke."