From sito@inria.fr Mon May 13 14:54:01 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!inria!sito From: sito@inria.fr (Sergei Ito) Newsgroups: comp.sys.m68k Subject: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May13.145401.9500@inria.fr> Date: Mon, 13 May 1996 14:54:01 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 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. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Sergei Ito "The carrier frequency does not drift by accident." Atari Falcon 030 / SunOS 4.1.4 From kkuznetsov@ox.ac.uk Wed May 15 10:20:01 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!ox!kkuznetsov From: kkuznetsov@ox.ac.uk (Karen Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May15.102001.2139@ox.ac.uk> Date: Wed, 15 May 1996 10:20:01 GMT References: <1996May13.145401.9500@inria.fr> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 8 In article <1996May13.145401.9500@inria.fr>, sito@inria.fr (Sergei Ito) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Karen Kuznetsov -- Oxford University Computing Laboratory "The hatch is open. Is anyone listening?" From mmuller@berkeley.edu Wed May 15 21:26:01 1996 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!mmuller From: mmuller@berkeley.edu (Mei Müller) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May15.212601.5369@berkeley.edu> Date: Wed, 15 May 1996 21:26:01 GMT References: <1996May13.145401.9500@inria.fr> <1996May15.102001.2139@ox.ac.uk> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996May15.102001.2139@ox.ac.uk>, kkuznetsov@ox.ac.uk (Karen Kuznetsov) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Mei Müller *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From mkim@demon.co.uk Thu May 16 02:54:01 1996 Path: ashpoly!cascade!bigsur!demon!mkim From: mkim@demon.co.uk (Matthias Kim) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May16.025401.4126@demon.co.uk> Date: Thu, 16 May 1996 02:54:01 GMT References: <1996May13.145401.9500@inria.fr> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1996May13.145401.9500@inria.fr>, sito@inria.fr (Sergei Ito) 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. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Matthias Kim US Robotics Courier V.34 @ ISDN 64k bps "5 sigma is a discovery. 7 is a question."