From stanaka@earthlink.net Sun Oct 27 17:36:55 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!earthlink!stanaka From: stanaka@earthlink.net (Sven Tanaka) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Oct27.173655.3123@earthlink.net> Date: Sun, 27 Oct 1996 17:36:55 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net 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. 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. -- === Sven Tanaka === Dept of Electrical Engineering, EarthLink Network "Row 14. No joke." From jkang@ox.ac.uk Tue Oct 29 19:07:55 1996 Path: ashpoly!cascade!brgate!saturno!ox!jkang From: jkang@ox.ac.uk (Joachim Kang) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Oct29.190755.9752@ox.ac.uk> Date: Tue, 29 Oct 1996 19:07:55 GMT References: <1996Oct27.173655.3123@earthlink.net> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Oct27.173655.3123@earthlink.net>, stanaka@earthlink.net (Sven Tanaka) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Joachim Kang *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From asantos@berkeley.edu Wed Oct 30 05:56:55 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!asantos From: asantos@berkeley.edu (Amy Santos) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Oct30.055655.1752@berkeley.edu> Date: Wed, 30 Oct 1996 05:56:55 GMT References: <1996Oct27.173655.3123@earthlink.net> <1996Oct29.190755.9752@ox.ac.uk> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1996Oct29.190755.9752@ox.ac.uk>, jkang@ox.ac.uk (Joachim Kang) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. If you are posting from AOL, please read RFC 1036 before posting again. -- Amy Santos "Hardware is temporary. The signal survives." Mac IIci / 68882 FPU / NEXTSTEP 3.3 From mtakahashi@purdue.edu Thu Oct 31 14:53:55 1996 Path: ashpoly!cascade!brgate!saturno!purdue!mtakahashi From: mtakahashi@purdue.edu (Mikhail Takahashi) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Oct31.145355.5230@purdue.edu> Date: Thu, 31 Oct 1996 14:53:55 GMT References: <1996Oct27.173655.3123@earthlink.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Oct27.173655.3123@earthlink.net>, stanaka@earthlink.net (Sven Tanaka) writes: > 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. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Mikhail Takahashi Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------