From dmuller@berkeley.edu Wed Apr 03 01:35:56 1996 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!dmuller From: dmuller@berkeley.edu (Dong-hyun Müller) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Apr03.013556.6463@berkeley.edu> Date: Wed, 03 Apr 1996 01:35:56 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Dong-hyun Müller | dmuller@berkeley.edu PGP Key fingerprint: 01F7 FA86 C64F 4E44 "Keep the channels open." From kkowalski@rwth-aachen.de Fri Apr 05 05:10:56 1996 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!kkowalski From: kkowalski@rwth-aachen.de (Karen Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Apr05.051056.1765@rwth-aachen.de> Date: Fri, 05 Apr 1996 05:10:56 GMT References: <1996Apr03.013556.6463@berkeley.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Apr03.013556.6463@berkeley.edu>, dmuller@berkeley.edu (Dong-hyun Müller) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. > The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Karen Kowalski "5 sigma is a discovery. 7 is a question." Macintosh IIfx / FreeBSD 2.1 From alaurent@kiae.su Fri Apr 05 19:20:56 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!kiae!alaurent From: alaurent@kiae.su (Astrid Laurent) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Apr05.192056.1633@kiae.su> Date: Fri, 05 Apr 1996 19:20:56 GMT References: <1996Apr03.013556.6463@berkeley.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Apr03.013556.6463@berkeley.edu>, dmuller@berkeley.edu (Dong-hyun Müller) 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. -- === Astrid Laurent === Dept of Electrical Engineering, Kurchatov Institute of Atomic Energy, Moscow "Measuring a record you own is listening, not piracy." From tlopez@cern.ch Sat Apr 06 16:00:56 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!cern!tlopez From: tlopez@cern.ch (Thiago López) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Apr06.160056.5528@cern.ch> Date: Sat, 06 Apr 1996 16:00:56 GMT References: <1996Apr03.013556.6463@berkeley.edu> <1996Apr05.192056.1633@kiae.su> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Apr05.192056.1633@kiae.su>, alaurent@kiae.su (Astrid Laurent) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. Top-posters will be placed in my ~/.killfile without notice. -- Thiago López Hayes Optima 288 @ 9600 Telebit bps "When every node is whole, the channel opens."