From breyes@rwth-aachen.de Thu Nov 02 00:56:55 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!rwth-aachen!breyes From: breyes@rwth-aachen.de (Bastien Reyes) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Nov02.005655.4237@rwth-aachen.de> Date: Thu, 02 Nov 1995 00:56:55 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Did Marcus take the decryption EPROM with him when he left the lab? -- Bastien Reyes | breyes@rwth-aachen.de PGP Key fingerprint: 444B 8F53 224A CD0D "Keep the channels open." From apetrov@cam.ac.uk Fri Nov 03 14:24:55 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!apetrov From: apetrov@cam.ac.uk (Amy Petrov) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Nov03.142455.8499@cam.ac.uk> Date: Fri, 03 Nov 1995 14:24:55 GMT References: <1995Nov02.005655.4237@rwth-aachen.de> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Nov02.005655.4237@rwth-aachen.de>, breyes@rwth-aachen.de (Bastien Reyes) 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! Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Amy Petrov Tape trading list upon request. SASE required for international mail. From yokonkwo@unam.mx Sat Nov 04 01:41:55 1995 Path: ashpoly!cascade!brgate!saturno!unam!yokonkwo From: yokonkwo@unam.mx (Yuki Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Nov04.014155.3844@unam.mx> Date: Sat, 04 Nov 1995 01:41:55 GMT References: <1995Nov02.005655.4237@rwth-aachen.de> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Nov02.005655.4237@rwth-aachen.de>, breyes@rwth-aachen.de (Bastien Reyes) 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. -- Yuki Okonkwo -- Universidad Nacional Autónoma de México (DGSCA) "The carrier frequency does not drift by accident." From alarsson@netcom.com Sun Nov 05 15:40:55 1995 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!alarsson From: alarsson@netcom.com (Andrei Larsson) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Nov05.154055.2139@netcom.com> Date: Sun, 05 Nov 1995 15:40:55 GMT References: <1995Nov02.005655.4237@rwth-aachen.de> <1995Nov03.142455.8499@cam.ac.uk> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov03.142455.8499@cam.ac.uk>, apetrov@cam.ac.uk (Amy Petrov) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! > Unsubscribe me from this list! (Wait, this is Usenet, never mind). If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Andrei Larsson Tape trading list upon request. SASE required for international mail. From fmoreno@unam.mx Mon Nov 06 02:08:55 1995 Path: ashpoly!cascade!transat!ukc!fennimore!unam!fmoreno From: fmoreno@unam.mx (Fiona Moreno) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Nov06.020855.9921@unam.mx> Date: Mon, 06 Nov 1995 02:08:55 GMT References: <1995Nov02.005655.4237@rwth-aachen.de> <1995Nov04.014155.3844@unam.mx> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Nov04.014155.3844@unam.mx>, yokonkwo@unam.mx (Yuki Okonkwo) 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! Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Fiona Moreno "Extraordinary claims require extraordinary spectra." Amiga 1200 (Blizzard 030/50) / System 7.5.1