From mtanaka@delphi.com Sat Apr 23 02:19:23 1994 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!mtanaka From: mtanaka@delphi.com (Mateo Tanaka) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr23.021923.5372@delphi.com> Date: Sat, 23 Apr 1994 02:19:23 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] 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. Did Marcus take the decryption EPROM with him when he left the lab? -- Mateo Tanaka "Hardware is temporary. The signal survives." Amiga 1200 (Blizzard 030/50) / System 7.5.1 From rpopov@clari.net Sun Apr 24 22:49:23 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!clari!rpopov From: rpopov@clari.net (Raj Popov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr24.224923.2069@clari.net> Date: Sun, 24 Apr 1994 22:49:23 GMT References: <1994Apr23.021923.5372@delphi.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr23.021923.5372@delphi.com>, mtanaka@delphi.com (Mateo Tanaka) 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. -- Raj Popov "We don't sign stars. We build them." Acorn RiscPC 600 / Linux 1.2.13 From lfournier@uu.net Wed Apr 27 01:04:23 1994 Path: ashpoly!cascade!brgate!saturno!uu!lfournier From: lfournier@uu.net (Lars Fournier) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr27.010423.8784@uu.net> Date: Wed, 27 Apr 1994 01:04:23 GMT References: <1994Apr23.021923.5372@delphi.com> <1994Apr24.224923.2069@clari.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Apr24.224923.2069@clari.net>, rpopov@clari.net (Raj Popov) writes: > Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Lars Fournier Practical Peripherals 14.4 @ 33,600 bps "Row 14. No joke." From kpopov@mit.edu Wed Apr 27 10:59:23 1994 Path: ashpoly!cascade!transat!ukc!fennimore!mit!kpopov From: kpopov@mit.edu (Kirsty Popov) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr27.105923.7822@mit.edu> Date: Wed, 27 Apr 1994 10:59:23 GMT References: <1994Apr23.021923.5372@delphi.com> <1994Apr24.224923.2069@clari.net> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Apr24.224923.2069@clari.net>, rpopov@clari.net (Raj Popov) writes: > Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Kirsty Popov Tape trading list upon request. SASE required for international mail.