From dandersson@utexas.edu Wed Jan 26 04:17:02 1994 Path: ashpoly!cascade!mxgate!coyoacan!utexas!dandersson From: dandersson@utexas.edu (Dong-hyun Andersson) Newsgroups: comp.sys.m68k Subject: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jan26.041702.2080@utexas.edu> Date: Wed, 26 Jan 1994 04:17:02 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N 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? -- Dong-hyun Andersson "In theory there is no difference between theory and practice." Decstation 5000/200 / FreeBSD 2.1 From jsuzuki@cern.ch Thu Jan 27 12:59:02 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!jsuzuki From: jsuzuki@cern.ch (Jens Suzuki) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jan27.125902.2373@cern.ch> Date: Thu, 27 Jan 1994 12:59:02 GMT References: <1994Jan26.041702.2080@utexas.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Jan26.041702.2080@utexas.edu>, dandersson@utexas.edu (Dong-hyun Andersson) writes: > 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. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Jens Suzuki "There are 14 nodes and only 10 countries. Count again." Commodore Amiga 500 (1MB OCS) / FreeBSD 2.1 From dsantos@uu.net Fri Jan 28 00:50:02 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!uu!dsantos From: dsantos@uu.net (Dave Santos) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jan28.005002.7446@uu.net> Date: Fri, 28 Jan 1994 00:50:02 GMT References: <1994Jan26.041702.2080@utexas.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Jan26.041702.2080@utexas.edu>, dandersson@utexas.edu (Dong-hyun Andersson) 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Dave Santos *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From blee@cmu.edu Sat Jan 29 23:07:02 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!blee From: blee@cmu.edu (Bastien Lee) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jan29.230702.5190@cmu.edu> Date: Sat, 29 Jan 1994 23:07:02 GMT References: <1994Jan26.041702.2080@utexas.edu> <1994Jan28.005002.7446@uu.net> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Jan28.005002.7446@uu.net>, dsantos@uu.net (Dave Santos) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Bastien Lee "Measuring a record you own is listening, not piracy." Sun 3/60 (SunOS 4.1.1) / System 7.5.1