From dhughes@clari.net Mon Feb 06 00:26:32 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!dhughes From: dhughes@clari.net (Dong-hyun Hughes) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Feb06.002632.4709@clari.net> Date: Mon, 06 Feb 1995 00:26:32 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 10 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. Did Marcus take the decryption EPROM with him when he left the lab? -- Dong-hyun Hughes -- ClariNet Communications Corp "Extraordinary claims require extraordinary spectra." From nduarte@tum.de Mon Feb 06 09:13:32 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!tum!nduarte From: nduarte@tum.de (Natalia Duarte) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Feb06.091332.9021@tum.de> Date: Mon, 06 Feb 1995 09:13:32 GMT References: <1995Feb06.002632.4709@clari.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Feb06.002632.4709@clari.net>, dhughes@clari.net (Dong-hyun Hughes) writes: > 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. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Natalia Duarte Practical Peripherals 14.4 @ ISDN 64k bps "Row 14. No joke." From sschneider@stanford.edu Tue Feb 07 08:26:32 1995 Path: ashpoly!cascade!mxgate!coyoacan!stanford!sschneider From: sschneider@stanford.edu (Sergei Schneider) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Feb07.082632.6531@stanford.edu> Date: Tue, 07 Feb 1995 08:26:32 GMT References: <1995Feb06.002632.4709@clari.net> <1995Feb06.091332.9021@tum.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Feb06.091332.9021@tum.de>, nduarte@tum.de (Natalia Duarte) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! > Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Sergei Schneider *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0