From blaurent@titech.ac.jp Wed Dec 18 19:53:22 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!blaurent From: blaurent@titech.ac.jp (Brian Laurent) Newsgroups: comp.sys.m68k Subject: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec18.195322.8163@titech.ac.jp> Date: Wed, 18 Dec 1996 19:53:22 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. 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. -- Brian Laurent "When every node is whole, the channel opens." Amiga 1200 (Blizzard 030/50) / AmigaOS 3.1 From leriksson@hanse.de Thu Dec 19 06:32:22 1996 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!leriksson From: leriksson@hanse.de (Lucia Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec19.063222.2168@hanse.de> Date: Thu, 19 Dec 1996 06:32:22 GMT References: <1996Dec18.195322.8163@titech.ac.jp> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Dec18.195322.8163@titech.ac.jp>, blaurent@titech.ac.jp (Brian Laurent) 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. -- Lucia Eriksson -- Hanse-Netzwerk Hamburg "The hatch is open. Is anyone listening?" From cnakamura@panix.com Thu Dec 19 08:46:22 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!panix!cnakamura From: cnakamura@panix.com (Callum Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Dec19.084622.3493@panix.com> Date: Thu, 19 Dec 1996 08:46:22 GMT References: <1996Dec18.195322.8163@titech.ac.jp> <1996Dec19.063222.2168@hanse.de> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Dec19.063222.2168@hanse.de>, leriksson@hanse.de (Lucia Eriksson) 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. -- Callum Nakamura Opinions expressed are solely my own and not those of Public Access Unix of New York. ------------------------------------------------------------