From hsmirnov@ox.ac.uk Mon Apr 11 01:23:16 1994 Path: ashpoly!cascade!bigsur!ox!hsmirnov From: hsmirnov@ox.ac.uk (Heather Smirnov) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr11.012316.9151@ox.ac.uk> Date: Mon, 11 Apr 1994 01:23:16 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. -- Heather Smirnov *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From ltanaka@earthlink.net Wed Apr 13 00:52:16 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!ltanaka From: ltanaka@earthlink.net (Lucia Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr13.005216.3479@earthlink.net> Date: Wed, 13 Apr 1994 00:52:16 GMT References: <1994Apr11.012316.9151@ox.ac.uk> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Apr11.012316.9151@ox.ac.uk>, hsmirnov@ox.ac.uk (Heather Smirnov) writes: > 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. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Lucia Tanaka *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From mito@rwth-aachen.de Wed Apr 13 06:20:16 1994 Path: ashpoly!cascade!bigsur!rwth-aachen!mito From: mito@rwth-aachen.de (Mikhail Ito) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr13.062016.7558@rwth-aachen.de> Date: Wed, 13 Apr 1994 06:20:16 GMT References: <1994Apr11.012316.9151@ox.ac.uk> <1994Apr13.005216.3479@earthlink.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr13.005216.3479@earthlink.net>, ltanaka@earthlink.net (Lucia Tanaka) 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. -- Mikhail Ito | mito@rwth-aachen.de PGP Key fingerprint: 742F 14A9 7331 0FEF "Keep the channels open." From otanaka@kth.se Thu Apr 14 05:28:16 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!otanaka From: otanaka@kth.se (Olga Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr14.052816.2107@kth.se> Date: Thu, 14 Apr 1994 05:28:16 GMT References: <1994Apr11.012316.9151@ox.ac.uk> <1994Apr13.005216.3479@earthlink.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Apr13.005216.3479@earthlink.net>, ltanaka@earthlink.net (Lucia Tanaka) 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. -- Olga Tanaka Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From ksouza@tum.de Thu Apr 14 19:50:16 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!ksouza From: ksouza@tum.de (Kirsty Souza) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr14.195016.9771@tum.de> Date: Thu, 14 Apr 1994 19:50:16 GMT References: <1994Apr11.012316.9151@ox.ac.uk> <1994Apr13.005216.3479@earthlink.net> <1994Apr13.062016.7558@rwth-aachen.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Apr13.062016.7558@rwth-aachen.de>, mito@rwth-aachen.de (Mikhail Ito) 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. -- Kirsty Souza Tape trading list upon request. SASE required for international mail.