From asuzuki@uu.net Fri Aug 12 12:01:00 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!asuzuki From: asuzuki@uu.net (Amy Suzuki) Newsgroups: comp.sys.m68k Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Aug12.120100.4130@uu.net> Date: Fri, 12 Aug 1994 12:01:00 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. 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. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Amy Suzuki *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From kweber@purdue.edu Sat Aug 13 10:47:00 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!purdue!kweber From: kweber@purdue.edu (Karen Weber) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Aug13.104700.1846@purdue.edu> Date: Sat, 13 Aug 1994 10:47:00 GMT References: <1994Aug12.120100.4130@uu.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Aug12.120100.4130@uu.net>, asuzuki@uu.net (Amy Suzuki) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. > Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Karen Weber Zyxel U-1496E @ 28,800 bps "In theory there is no difference between theory and practice." From tlee@kth.se Sat Aug 13 21:35:00 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!tlee From: tlee@kth.se (Thiago Lee) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Aug13.213500.3832@kth.se> Date: Sat, 13 Aug 1994 21:35:00 GMT References: <1994Aug12.120100.4130@uu.net> <1994Aug13.104700.1846@purdue.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Aug13.104700.1846@purdue.edu>, kweber@purdue.edu (Karen Weber) 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. -- Thiago Lee -- Royal Institute of Technology, Stockholm "The hatch is open. Is anyone listening?" From nkang@berkeley.edu Sun Aug 14 23:16:00 1994 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!nkang From: nkang@berkeley.edu (Natalia Kang) Newsgroups: comp.sys.m68k Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Aug14.231600.8370@berkeley.edu> Date: Sun, 14 Aug 1994 23:16:00 GMT References: <1994Aug12.120100.4130@uu.net> <1994Aug13.104700.1846@purdue.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Aug13.104700.1846@purdue.edu>, kweber@purdue.edu (Karen Weber) 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. -- Natalia Kang Tape trading list upon request. SASE required for international mail.