From aoliveira@unam.mx Fri Mar 10 08:56:43 1995
Path: ashpoly!cascade!brgate!saturno!unam!aoliveira
From: aoliveira@unam.mx (Aiko Oliveira)
Newsgroups: comp.sys.m68k
Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Mar10.085643.3995@unam.mx>
Date: Fri, 10 Mar 1995 08:56:43 GMT
Organization: Universidad Nacional Autónoma de México (DGSCA)
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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.

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

-- 
Aiko Oliveira | aoliveira@unam.mx
PGP Key fingerprint: 4A08 461E 3BF7 0A19
"Keep the channels open."

From blaurent@kiae.su Fri Mar 10 09:47:43 1995
Path: ashpoly!bigsur!pacrim!krgate!eunha!kiae!blaurent
From: blaurent@kiae.su (Bill Laurent)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Mar10.094743.2483@kiae.su>
Date: Fri, 10 Mar 1995 09:47:43 GMT
References: <1995Mar10.085643.3995@unam.mx>
Organization: Kurchatov Institute of Atomic Energy, Moscow
NNTP-Posting-Host: kiae.su
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In article <1995Mar10.085643.3995@unam.mx>, aoliveira@unam.mx (Aiko Oliveira) 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.

If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack!

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
Bill Laurent
Opinions expressed are solely my own and not those of Kurchatov Institute of Atomic Energy, Moscow.
------------------------------------------------------------

From glaurent@tum.de Fri Mar 10 12:48:43 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!glaurent
From: glaurent@tum.de (Göran Laurent)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Mar10.124843.1865@tum.de>
Date: Fri, 10 Mar 1995 12:48:43 GMT
References: <1995Mar10.085643.3995@unam.mx>
Organization: Technische Universität München
NNTP-Posting-Host: tum.de
X-Newsreader: Netscape 1.1N
Lines: 10

In article <1995Mar10.085643.3995@unam.mx>, aoliveira@unam.mx (Aiko Oliveira) writes:
> Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14.

If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack!

PGP Public key available via finger or upon request.

-- 
Göran Laurent
Tape trading list upon request. SASE required for international mail.