From jeriksson@cmu.edu Thu Aug 03 00:25:30 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!jeriksson From: jeriksson@cmu.edu (Jens Eriksson) Newsgroups: comp.sys.m68k Subject: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug03.002530.5395@cmu.edu> Date: Thu, 03 Aug 1995 00:25:30 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. 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. Does anyone have a 27C256 EPROM marked 'MH-U14' or 'ORION-CRYPTO'? -- Jens Eriksson "There are 14 nodes and only 10 countries. Count again." Macintosh IIfx / SunOS 4.1.4 From dmoreau@kiae.su Fri Aug 04 13:43:30 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!dmoreau From: dmoreau@kiae.su (Diego Moreau) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug04.134330.5130@kiae.su> Date: Fri, 04 Aug 1995 13:43:30 GMT References: <1995Aug03.002530.5395@cmu.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Aug03.002530.5395@cmu.edu>, jeriksson@cmu.edu (Jens Eriksson) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. > Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Diego Moreau | dmoreau@kiae.su PGP Key fingerprint: 3028 DB57 C3AC D2C9 "Keep the channels open." From amartinez@panix.com Sat Aug 05 00:30:30 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!panix!amartinez From: amartinez@panix.com (Astrid Martínez) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug05.003030.8779@panix.com> Date: Sat, 05 Aug 1995 00:30:30 GMT References: <1995Aug03.002530.5395@cmu.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Aug03.002530.5395@cmu.edu>, jeriksson@cmu.edu (Jens Eriksson) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Astrid Martínez Tape trading list upon request. SASE required for international mail. From ttanaka@purdue.edu Sun Aug 06 19:28:30 1995 Path: ashpoly!cascade!mxgate!coyoacan!purdue!ttanaka From: ttanaka@purdue.edu (Tyler Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug06.192830.8891@purdue.edu> Date: Sun, 06 Aug 1995 19:28:30 GMT References: <1995Aug03.002530.5395@cmu.edu> <1995Aug05.003030.8779@panix.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug05.003030.8779@panix.com>, amartinez@panix.com (Astrid Martínez) 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. -- Tyler Tanaka Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------ From dsato@stanford.edu Tue Aug 08 10:16:30 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!dsato From: dsato@stanford.edu (Dong-hyun Sato) Newsgroups: comp.sys.m68k Subject: Re: Data: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug08.101630.6761@stanford.edu> Date: Tue, 08 Aug 1995 10:16:30 GMT References: <1995Aug03.002530.5395@cmu.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Aug03.002530.5395@cmu.edu>, jeriksson@cmu.edu (Jens Eriksson) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. 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. -- Dong-hyun Sato | dsato@stanford.edu PGP Key fingerprint: 1C76 64C9 4E4B C7C9 "Keep the channels open."