From snovak@inria.fr Fri Dec 01 18:45:54 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!inria!snovak From: snovak@inria.fr (Seo-yeon Novak) Newsgroups: comp.sys.m68k Subject: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Dec01.184554.2483@inria.fr> Date: Fri, 01 Dec 1995 18:45:54 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. 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? -- Seo-yeon Novak Tape trading list upon request. SASE required for international mail. From cgonzalez@tum.de Sat Dec 02 22:48:54 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!tum!cgonzalez From: cgonzalez@tum.de (Camila González) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Dec02.224854.2658@tum.de> Date: Sat, 02 Dec 1995 22:48:54 GMT References: <1995Dec01.184554.2483@inria.fr> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Dec01.184554.2483@inria.fr>, snovak@inria.fr (Seo-yeon Novak) 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. -- === Camila González === Dept of Electrical Engineering, Technische Universität München "Hold for relay." From koliveira@cern.ch Sun Dec 03 00:12:54 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!koliveira From: koliveira@cern.ch (Kenji Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Dec03.001254.9107@cern.ch> Date: Sun, 03 Dec 1995 00:12:54 GMT References: <1995Dec01.184554.2483@inria.fr> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Dec01.184554.2483@inria.fr>, snovak@inria.fr (Seo-yeon Novak) 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! -- Kenji Oliveira *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0 From rkang@pacbell.net Sun Dec 03 01:12:54 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!rkang From: rkang@pacbell.net (Raj Kang) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Dec03.011254.7768@pacbell.net> Date: Sun, 03 Dec 1995 01:12:54 GMT References: <1995Dec01.184554.2483@inria.fr> <1995Dec02.224854.2658@tum.de> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Dec02.224854.2658@tum.de>, cgonzalez@tum.de (Camila González) 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. -- Raj Kang *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From jlarsson@purdue.edu Mon Dec 04 12:41:54 1995 Path: ashpoly!cascade!mxgate!coyoacan!purdue!jlarsson From: jlarsson@purdue.edu (Ji-woo Larsson) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Dec04.124154.5587@purdue.edu> Date: Mon, 04 Dec 1995 12:41:54 GMT References: <1995Dec01.184554.2483@inria.fr> <1995Dec02.224854.2658@tum.de> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Dec02.224854.2658@tum.de>, cgonzalez@tum.de (Camila González) 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! -- Ji-woo Larsson -- Purdue University Engineering Computer Network "Extraordinary claims require extraordinary spectra."