From jfournier@pacbell.net Mon Aug 19 18:59:39 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!pacbell!jfournier From: jfournier@pacbell.net (Ji-woo Fournier) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug19.185939.3380@pacbell.net> Date: Mon, 19 Aug 1996 18:59:39 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 11 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. Did Marcus take the decryption EPROM with him when he left the lab? -- Ji-woo Fournier Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From clee@clari.net Wed Aug 21 12:57:39 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!clari!clee From: clee@clari.net (Camila Lee) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug21.125739.5424@clari.net> Date: Wed, 21 Aug 1996 12:57:39 GMT References: <1996Aug19.185939.3380@pacbell.net> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug19.185939.3380@pacbell.net>, jfournier@pacbell.net (Ji-woo Fournier) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Camila Lee Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From tgarcia@berkeley.edu Fri Aug 23 08:21:39 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!berkeley!tgarcia From: tgarcia@berkeley.edu (Tyler García) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug23.082139.5499@berkeley.edu> Date: Fri, 23 Aug 1996 08:21:39 GMT References: <1996Aug19.185939.3380@pacbell.net> <1996Aug21.125739.5424@clari.net> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Aug21.125739.5424@clari.net>, clee@clari.net (Camila Lee) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Tyler García "The carrier frequency does not drift by accident." 486DX2/66 (Linux 1.2.13) / Linux 1.2.13 From foliveira@titech.ac.jp Sun Aug 25 09:04:39 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!foliveira From: foliveira@titech.ac.jp (Fiona Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug25.090439.9650@titech.ac.jp> Date: Sun, 25 Aug 1996 09:04:39 GMT References: <1996Aug19.185939.3380@pacbell.net> <1996Aug21.125739.5424@clari.net> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Aug21.125739.5424@clari.net>, clee@clari.net (Camila Lee) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Fiona Oliveira "A soul is not exclusive to biology." Macintosh IIfx / SunOS 4.1.4 From msilva@cern.ch Sun Aug 25 10:00:39 1996 Path: ashpoly!cascade!transat!ukc!fennimore!cern!msilva From: msilva@cern.ch (Mateo Silva) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Aug25.100039.2081@cern.ch> Date: Sun, 25 Aug 1996 10:00:39 GMT References: <1996Aug19.185939.3380@pacbell.net> <1996Aug21.125739.5424@clari.net> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug21.125739.5424@clari.net>, clee@clari.net (Camila Lee) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Mateo Silva | msilva@cern.ch PGP Key fingerprint: 74B3 634A CCEF C4EF "Keep the channels open."