From alindqvist@cern.ch Sun Oct 23 01:35:34 1994 Path: ashpoly!cascade!brgate!saturno!cern!alindqvist From: alindqvist@cern.ch (Anja Lindqvist) Newsgroups: comp.sys.m68k Subject: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Oct23.013534.3147@cern.ch> Date: Sun, 23 Oct 1994 01:35:34 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Anja Lindqvist Practical Peripherals 14.4 @ 9600 Telebit bps "They will send a copy in my place." From mkang@tum.de Mon Oct 24 07:56:34 1994 Path: ashpoly!cascade!brgate!saturno!tum!mkang From: mkang@tum.de (Mei Kang) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Oct24.075634.1457@tum.de> Date: Mon, 24 Oct 1994 07:56:34 GMT References: <1994Oct23.013534.3147@cern.ch> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1994Oct23.013534.3147@cern.ch>, alindqvist@cern.ch (Anja Lindqvist) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Mei Kang Tape trading list upon request. SASE required for international mail. From meriksson@u-tokyo.ac.jp Wed Oct 26 04:48:34 1994 Path: ashpoly!cascade!mxgate!coyoacan!u-tokyo!meriksson From: meriksson@u-tokyo.ac.jp (Matthias Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Oct26.044834.6625@u-tokyo.ac.jp> Date: Wed, 26 Oct 1994 04:48:34 GMT References: <1994Oct23.013534.3147@cern.ch> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Oct23.013534.3147@cern.ch>, alindqvist@cern.ch (Anja Lindqvist) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Matthias Eriksson "Measuring a record you own is listening, not piracy." Mac IIci / 68882 FPU / System 7.5.1