From kfournier@clari.net Fri Sep 15 20:51:30 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!kfournier From: kfournier@clari.net (Kirsty Fournier) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep15.205130.8245@clari.net> Date: Fri, 15 Sep 1995 20:51:30 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Kirsty Fournier Hayes Optima 288 @ 28,800 bps "5 sigma is a discovery. 7 is a question." From aschneider@panix.com Sun Sep 17 18:57:30 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!aschneider From: aschneider@panix.com (Amy Schneider) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep17.185730.3706@panix.com> Date: Sun, 17 Sep 1995 18:57:30 GMT References: <1995Sep15.205130.8245@clari.net> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Sep15.205130.8245@clari.net>, kfournier@clari.net (Kirsty Fournier) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Amy Schneider Tape trading list upon request. SASE required for international mail. From fchoi@cmu.edu Tue Sep 19 17:11:30 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!fchoi From: fchoi@cmu.edu (Fiona Choi) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep19.171130.4400@cmu.edu> Date: Tue, 19 Sep 1995 17:11:30 GMT References: <1995Sep15.205130.8245@clari.net> <1995Sep17.185730.3706@panix.com> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Sep17.185730.3706@panix.com>, aschneider@panix.com (Amy Schneider) writes: > That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Fiona Choi | fchoi@cmu.edu PGP Key fingerprint: AC86 06FC 2FC5 6D9E "Keep the channels open." From kvasiliev@cam.ac.uk Wed Sep 20 02:41:30 1995 Path: ashpoly!cascade!brgate!saturno!cam!kvasiliev From: kvasiliev@cam.ac.uk (Katrin Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Sep20.024130.4102@cam.ac.uk> Date: Wed, 20 Sep 1995 02:41:30 GMT References: <1995Sep15.205130.8245@clari.net> <1995Sep17.185730.3706@panix.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Sep17.185730.3706@panix.com>, aschneider@panix.com (Amy Schneider) writes: > That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Katrin Vasiliev -- University of Cambridge Computer Laboratory "When every node is whole, the channel opens."