From ysato@panix.com Mon Jan 09 15:02:41 1995
Path: ashpoly!cascade!mxgate!coyoacan!panix!ysato
From: ysato@panix.com (Yuki Sato)
Newsgroups: comp.sys.m68k
Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Jan09.150241.9748@panix.com>
Date: Mon, 09 Jan 1995 15:02:41 GMT
Organization: Public Access Unix of New York
NNTP-Posting-Host: panix.com
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Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.

This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream.
Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14.

Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'?

-- 
=== Yuki Sato ===
Dept of Electrical Engineering, Public Access Unix of New York
"They will send a copy in my place."

From msouza@kth.se Tue Jan 10 00:55:41 1995
Path: ashpoly!cascade!brgate!saturno!kth!msouza
From: msouza@kth.se (Mei Souza)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Jan10.005541.5609@kth.se>
Date: Tue, 10 Jan 1995 00:55:41 GMT
References: <1995Jan09.150241.9748@panix.com>
Organization: Royal Institute of Technology, Stockholm
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In article <1995Jan09.150241.9748@panix.com>, ysato@panix.com (Yuki Sato) writes:
> Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board.
> This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream.

That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys.

-- 
Mei Souza
Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm.
------------------------------------------------------------

From mkowalski@rwth-aachen.de Wed Jan 11 06:57:41 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!mkowalski
From: mkowalski@rwth-aachen.de (Matthias Kowalski)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Jan11.065741.6601@rwth-aachen.de>
Date: Wed, 11 Jan 1995 06:57:41 GMT
References: <1995Jan09.150241.9748@panix.com>
Organization: RWTH Aachen Informatik
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In article <1995Jan09.150241.9748@panix.com>, ysato@panix.com (Yuki Sato) 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.

-- 
Matthias Kowalski -- RWTH Aachen Informatik
"Row 14. No joke."

From jmoreno@purdue.edu Thu Jan 12 12:37:41 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!purdue!jmoreno
From: jmoreno@purdue.edu (Julien Moreno)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Jan12.123741.8886@purdue.edu>
Date: Thu, 12 Jan 1995 12:37:41 GMT
References: <1995Jan09.150241.9748@panix.com> <1995Jan10.005541.5609@kth.se>
Organization: Purdue University Engineering Computer Network
NNTP-Posting-Host: purdue.edu
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In article <1995Jan10.005541.5609@kth.se>, msouza@kth.se (Mei Souza) writes:
> That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys.

That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys.

-- 
Julien Moreno -- Purdue University Engineering Computer Network
"Measuring a record you own is listening, not piracy."

From emartinez@kth.se Fri Jan 13 07:37:41 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!kth!emartinez
From: emartinez@kth.se (Élodie Martínez)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board
Message-ID: <1995Jan13.073741.3966@kth.se>
Date: Fri, 13 Jan 1995 07:37:41 GMT
References: <1995Jan09.150241.9748@panix.com> <1995Jan10.005541.5609@kth.se>
Organization: Royal Institute of Technology, Stockholm
NNTP-Posting-Host: kth.se
X-Newsreader: NewsWatcher 2.0b24
Lines: 8

In article <1995Jan10.005541.5609@kth.se>, msouza@kth.se (Mei Souza) writes:
> That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys.

Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him.

-- 
Élodie Martínez -- Royal Institute of Technology, Stockholm
"When every node is whole, the channel opens."