From lchoi@rwth-aachen.de Fri Sep 09 10:39:48 1994 Path: ashpoly!cascade!brgate!saturno!rwth-aachen!lchoi From: lchoi@rwth-aachen.de (Lucia Choi) Newsgroups: comp.sys.m68k Subject: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep09.103948.1549@rwth-aachen.de> Date: Fri, 09 Sep 1994 10:39:48 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 11 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. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- === Lucia Choi === Dept of Electrical Engineering, RWTH Aachen Informatik "We don't sign stars. We build them." From pnilsson@titech.ac.jp Sat Sep 10 01:15:48 1994 Path: ashpoly!cascade!bigsur!titech!pnilsson From: pnilsson@titech.ac.jp (Pavel Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep10.011548.6587@titech.ac.jp> Date: Sat, 10 Sep 1994 01:15:48 GMT References: <1994Sep09.103948.1549@rwth-aachen.de> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Sep09.103948.1549@rwth-aachen.de>, lchoi@rwth-aachen.de (Lucia Choi) 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! -- Pavel Nilsson *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From lreyes@earthlink.net Mon Sep 12 02:56:48 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!lreyes From: lreyes@earthlink.net (Liam Reyes) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Sep12.025648.1041@earthlink.net> Date: Mon, 12 Sep 1994 02:56:48 GMT References: <1994Sep09.103948.1549@rwth-aachen.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Sep09.103948.1549@rwth-aachen.de>, lchoi@rwth-aachen.de (Lucia Choi) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Liam Reyes *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0