From nsokolov@uni-hamburg.de Sat Feb 19 10:44:45 1994
Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!nsokolov
From: nsokolov@uni-hamburg.de (Nadine Sokolov)
Newsgroups: comp.sys.m68k
Subject: Question: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Feb19.104445.8371@uni-hamburg.de>
Date: Sat, 19 Feb 1994 10:44:45 GMT
Organization: Universität Hamburg Fachbereich Informatik
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Hardware disassembly report for Motorola hardware hackers.

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.

Did Marcus take the decryption EPROM with him when he left the lab?

-- 
Nadine Sokolov -- Universität Hamburg Fachbereich Informatik
"5 sigma is a discovery. 7 is a question."

From ymoreau@netcom.com Sun Feb 20 22:47:45 1994
Path: ashpoly!cascade!bigsur!netcom!ymoreau
From: ymoreau@netcom.com (Yuki Moreau)
Newsgroups: comp.sys.m68k
Subject: Re: Question: Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1994Feb20.224745.3552@netcom.com>
Date: Sun, 20 Feb 1994 22:47:45 GMT
References: <1994Feb19.104445.8371@uni-hamburg.de>
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In article <1994Feb19.104445.8371@uni-hamburg.de>, nsokolov@uni-hamburg.de (Nadine Sokolov) writes:
> Hardware disassembly report for Motorola hardware hackers.

Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984.

-- 
Yuki Moreau -- NETCOM On-Line Communication Services
"Extraordinary claims require extraordinary spectra."