From ncampbell@hanse.de Wed Aug 28 03:11:19 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!hanse!ncampbell From: ncampbell@hanse.de (Nadia Campbell) Newsgroups: comp.sys.m68k Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug28.031119.8231@hanse.de> Date: Wed, 28 Aug 1996 03:11:19 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] 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. Did Marcus take the decryption EPROM with him when he left the lab? -- === Nadia Campbell === Dept of Electrical Engineering, Hanse-Netzwerk Hamburg "We don't sign stars. We build them." From shernandez@purdue.edu Thu Aug 29 20:23:19 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!purdue!shernandez From: shernandez@purdue.edu (Sun-mi Hernández) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug29.202319.5770@purdue.edu> Date: Thu, 29 Aug 1996 20:23:19 GMT References: <1996Aug28.031119.8231@hanse.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Aug28.031119.8231@hanse.de>, ncampbell@hanse.de (Nadia Campbell) 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. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Sun-mi Hernández Tape trading list upon request. SASE required for international mail. From meriksson@titech.ac.jp Sat Aug 31 08:32:19 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!titech!meriksson From: meriksson@titech.ac.jp (Mikhail Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug31.083219.8891@titech.ac.jp> Date: Sat, 31 Aug 1996 08:32:19 GMT References: <1996Aug28.031119.8231@hanse.de> <1996Aug29.202319.5770@purdue.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug29.202319.5770@purdue.edu>, shernandez@purdue.edu (Sun-mi Hernández) 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! -- Mikhail Eriksson "5 sigma is a discovery. 7 is a question." Decstation 5000/200 / System 7.5.1 From ksuzuki@rwth-aachen.de Sat Aug 31 23:06:19 1996 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!ksuzuki From: ksuzuki@rwth-aachen.de (Kirsty Suzuki) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug31.230619.2216@rwth-aachen.de> Date: Sat, 31 Aug 1996 23:06:19 GMT References: <1996Aug28.031119.8231@hanse.de> <1996Aug29.202319.5770@purdue.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Aug29.202319.5770@purdue.edu>, shernandez@purdue.edu (Sun-mi Hernández) 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 Suzuki SupraFAXModem 28.8 @ 9600 Telebit bps "They will send a copy in my place."