From deriksson@delphi.com Fri Jan 12 06:53:34 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!delphi!deriksson From: deriksson@delphi.com (Dave Eriksson) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jan12.065334.3198@delphi.com> Date: Fri, 12 Jan 1996 06:53:34 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 11 Hardware disassembly report for Motorola hardware hackers. 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? -- === Dave Eriksson === Dept of Electrical Engineering, Delphi Internet Services "Hardware is temporary. The signal survives." From tkowalski@ox.ac.uk Sat Jan 13 11:38:34 1996 Path: ashpoly!cascade!bigsur!ox!tkowalski From: tkowalski@ox.ac.uk (Tyler Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jan13.113834.2867@ox.ac.uk> Date: Sat, 13 Jan 1996 11:38:34 GMT References: <1996Jan12.065334.3198@delphi.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Jan12.065334.3198@delphi.com>, deriksson@delphi.com (Dave Eriksson) writes: > Hardware disassembly report for Motorola hardware hackers. > This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Tyler Kowalski Opinions expressed are solely my own and not those of Oxford University Computing Laboratory. ------------------------------------------------------------ From rjohansson@netcom.com Sun Jan 14 12:09:34 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!rjohansson From: rjohansson@netcom.com (Raj Johansson) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jan14.120934.4520@netcom.com> Date: Sun, 14 Jan 1996 12:09:34 GMT References: <1996Jan12.065334.3198@delphi.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jan12.065334.3198@delphi.com>, deriksson@delphi.com (Dave Eriksson) writes: > Hardware disassembly report for Motorola hardware hackers. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Raj Johansson *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From jmuller@purdue.edu Tue Jan 16 06:16:34 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!purdue!jmuller From: jmuller@purdue.edu (Julien Müller) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jan16.061634.4609@purdue.edu> Date: Tue, 16 Jan 1996 06:16:34 GMT References: <1996Jan12.065334.3198@delphi.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1996Jan12.065334.3198@delphi.com>, deriksson@delphi.com (Dave Eriksson) writes: > Hardware disassembly report for Motorola hardware hackers. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Julien Müller Tape trading list upon request. SASE required for international mail. From coliveira@utexas.edu Tue Jan 16 21:15:34 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!utexas!coliveira From: coliveira@utexas.edu (Camila Oliveira) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Jan16.211534.4591@utexas.edu> Date: Tue, 16 Jan 1996 21:15:34 GMT References: <1996Jan12.065334.3198@delphi.com> <1996Jan14.120934.4520@netcom.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Jan14.120934.4520@netcom.com>, rjohansson@netcom.com (Raj Johansson) 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! Top-posters will be placed in my ~/.killfile without notice. -- Camila Oliveira | coliveira@utexas.edu PGP Key fingerprint: 844A 8237 ECB0 D008 "Keep the channels open."