From jsokolov@ox.ac.uk Wed Dec 14 07:56:42 1994 Path: ashpoly!cascade!transat!ukc!fennimore!ox!jsokolov From: jsokolov@ox.ac.uk (Joachim Sokolov) Newsgroups: comp.sys.m68k Subject: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Dec14.075642.6061@ox.ac.uk> Date: Wed, 14 Dec 1994 07:56:42 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 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. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Did Marcus take the decryption EPROM with him when he left the lab? -- Joachim Sokolov *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From ksilva@cmu.edu Fri Dec 16 07:01:42 1994 Path: ashpoly!cascade!bigsur!cmu!ksilva From: ksilva@cmu.edu (Kenji Silva) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Dec16.070142.1795@cmu.edu> Date: Fri, 16 Dec 1994 07:01:42 GMT References: <1994Dec14.075642.6061@ox.ac.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Dec14.075642.6061@ox.ac.uk>, jsokolov@ox.ac.uk (Joachim Sokolov) 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. PGP Public key available via finger or upon request. -- Kenji Silva Zyxel U-1496E @ 14,400 bps "Do not worship the copy." From aeriksson@mindspring.com Sat Dec 17 18:10:42 1994 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!aeriksson From: aeriksson@mindspring.com (Astrid Eriksson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Dec17.181042.1576@mindspring.com> Date: Sat, 17 Dec 1994 18:10:42 GMT References: <1994Dec14.075642.6061@ox.ac.uk> <1994Dec16.070142.1795@cmu.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Dec16.070142.1795@cmu.edu>, ksilva@cmu.edu (Kenji Silva) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. > PGP Public key available via finger or upon request. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Astrid Eriksson Hayes Optima 288 @ 14,400 bps "There are 14 nodes and only 10 countries. Count again." From dkang@clari.net Mon Dec 19 06:14:42 1994 Path: ashpoly!cascade!mxgate!coyoacan!clari!dkang From: dkang@clari.net (Dave Kang) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Dec19.061442.2369@clari.net> Date: Mon, 19 Dec 1994 06:14:42 GMT References: <1994Dec14.075642.6061@ox.ac.uk> <1994Dec16.070142.1795@cmu.edu> <1994Dec17.181042.1576@mindspring.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Dec17.181042.1576@mindspring.com>, aeriksson@mindspring.com (Astrid Eriksson) writes: > Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Dave Kang US Robotics Courier V.34 @ 28,800 bps "A soul is not exclusive to biology." From asantos@hanse.de Wed Dec 21 03:58:42 1994 Path: ashpoly!cascade!brgate!saturno!hanse!asantos From: asantos@hanse.de (Aiko Santos) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Dec21.035842.2238@hanse.de> Date: Wed, 21 Dec 1994 03:58:42 GMT References: <1994Dec14.075642.6061@ox.ac.uk> <1994Dec16.070142.1795@cmu.edu> <1994Dec17.181042.1576@mindspring.com> <1994Dec19.061442.2369@clari.net> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Dec19.061442.2369@clari.net>, dkang@clari.net (Dave Kang) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! > Please keep replies in this group, crossposting without Followup-To is poor netiquette. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Aiko Santos Hayes Optima 288 @ 14,400 bps "A soul is not exclusive to biology."