From lnovak@clari.net Thu Sep 01 02:30:28 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!lnovak From: lnovak@clari.net (Lisa Novak) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep01.023028.3746@clari.net> Date: Thu, 01 Sep 1994 02:30:28 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. 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? -- Lisa Novak *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From lito@rwth-aachen.de Thu Sep 01 20:43:28 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!rwth-aachen!lito From: lito@rwth-aachen.de (Lucia Ito) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep01.204328.3238@rwth-aachen.de> Date: Thu, 01 Sep 1994 20:43:28 GMT References: <1994Sep01.023028.3746@clari.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Sep01.023028.3746@clari.net>, lnovak@clari.net (Lisa Novak) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Lucia Ito "Hardware is temporary. The signal survives." Pentium 90 (OS/2 Warp) / SunOS 4.1.4 From jnilsson@cam.ac.uk Sat Sep 03 22:06:28 1994 Path: ashpoly!cascade!mxgate!coyoacan!cam!jnilsson From: jnilsson@cam.ac.uk (Julien Nilsson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep03.220628.2303@cam.ac.uk> Date: Sat, 03 Sep 1994 22:06:28 GMT References: <1994Sep01.023028.3746@clari.net> <1994Sep01.204328.3238@rwth-aachen.de> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Sep01.204328.3238@rwth-aachen.de>, lito@rwth-aachen.de (Lucia Ito) writes: > That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Julien Nilsson "There are 14 nodes and only 10 countries. Count again." Pentium 90 (OS/2 Warp) / System 7.5.1