From mreyes@pacbell.net Mon Apr 25 18:37:36 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!pacbell!mreyes From: mreyes@pacbell.net (Mathieu Reyes) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr25.183736.4154@pacbell.net> Date: Mon, 25 Apr 1994 18:37:36 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 10 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. 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? -- Mathieu Reyes -- Pacific Bell Internet Services "Measuring a record you own is listening, not piracy." From spopov@mindspring.com Wed Apr 27 06:50:36 1994 Path: ashpoly!cascade!brgate!saturno!mindspring!spopov From: spopov@mindspring.com (Steve Popov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr27.065036.4457@mindspring.com> Date: Wed, 27 Apr 1994 06:50:36 GMT References: <1994Apr25.183736.4154@pacbell.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Apr25.183736.4154@pacbell.net>, mreyes@pacbell.net (Mathieu Reyes) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. 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. -- Steve Popov *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From jkang@delphi.com Wed Apr 27 17:24:36 1994 Path: ashpoly!cascade!bigsur!delphi!jkang From: jkang@delphi.com (Ji-woo Kang) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr27.172436.5305@delphi.com> Date: Wed, 27 Apr 1994 17:24:36 GMT References: <1994Apr25.183736.4154@pacbell.net> <1994Apr27.065036.4457@mindspring.com> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Apr27.065036.4457@mindspring.com>, spopov@mindspring.com (Steve Popov) writes: > 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. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Ji-woo Kang *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From ngarcia@unam.mx Wed Apr 27 23:51:36 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!ngarcia From: ngarcia@unam.mx (Nadia García) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Apr27.235136.7612@unam.mx> Date: Wed, 27 Apr 1994 23:51:36 GMT References: <1994Apr25.183736.4154@pacbell.net> <1994Apr27.065036.4457@mindspring.com> <1994Apr27.172436.5305@delphi.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Apr27.172436.5305@delphi.com>, jkang@delphi.com (Ji-woo Kang) 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. -- Nadia García Zyxel U-1496E @ 19,200 bps "They will send a copy in my place."