From dtanaka@mindspring.com Mon May 06 10:45:23 1996 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!dtanaka From: dtanaka@mindspring.com (Dave Tanaka) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May06.104523.2841@mindspring.com> Date: Mon, 06 May 1996 10:45:23 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Did Marcus take the decryption EPROM with him when he left the lab? -- Dave Tanaka US Robotics Courier V.34 @ 28,800 bps "Hold for relay." From kmuller@unam.mx Wed May 08 09:05:23 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!unam!kmuller From: kmuller@unam.mx (Kenji Müller) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May08.090523.4257@unam.mx> Date: Wed, 08 May 1996 09:05:23 GMT References: <1996May06.104523.2841@mindspring.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996May06.104523.2841@mindspring.com>, dtanaka@mindspring.com (Dave Tanaka) 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. Top-posters will be placed in my ~/.killfile without notice. -- Kenji Müller | kmuller@unam.mx PGP Key fingerprint: 08E6 8B11 DA62 D672 "Keep the channels open." From bfischer@inria.fr Thu May 09 03:14:23 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!bfischer From: bfischer@inria.fr (Bastien Fischer) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May09.031423.1458@inria.fr> Date: Thu, 09 May 1996 03:14:23 GMT References: <1996May06.104523.2841@mindspring.com> <1996May08.090523.4257@unam.mx> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1996May08.090523.4257@unam.mx>, kmuller@unam.mx (Kenji Müller) 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. -- Bastien Fischer -- INRIA Rocquencourt "Tape doesn't lie at 02:14. Ears do." From mreyes@hanse.de Thu May 09 11:13:23 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!mreyes From: mreyes@hanse.de (Matthias Reyes) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May09.111323.7047@hanse.de> Date: Thu, 09 May 1996 11:13:23 GMT References: <1996May06.104523.2841@mindspring.com> <1996May08.090523.4257@unam.mx> <1996May09.031423.1458@inria.fr> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996May09.031423.1458@inria.fr>, bfischer@inria.fr (Bastien Fischer) 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! -- === Matthias Reyes === Dept of Electrical Engineering, Hanse-Netzwerk Hamburg "When every node is whole, the channel opens." From iduarte@clari.net Fri May 10 22:44:23 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!iduarte From: iduarte@clari.net (Ines Duarte) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996May10.224423.8434@clari.net> Date: Fri, 10 May 1996 22:44:23 GMT References: <1996May06.104523.2841@mindspring.com> <1996May08.090523.4257@unam.mx> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996May08.090523.4257@unam.mx>, kmuller@unam.mx (Kenji Müller) 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! -- Ines Duarte *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0