From ehernandez@unam.mx Sun Nov 05 14:52:28 1995 Path: ashpoly!cascade!bigsur!unam!ehernandez From: ehernandez@unam.mx (Emi Hernández) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Nov05.145228.2147@unam.mx> Date: Sun, 05 Nov 1995 14:52:28 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Hardware disassembly report for Motorola hardware hackers. 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. Did Marcus take the decryption EPROM with him when he left the lab? -- Emi Hernández Tape trading list upon request. SASE required for international mail. From gandersson@inria.fr Tue Nov 07 10:15:28 1995 Path: ashpoly!cascade!bigsur!inria!gandersson From: gandersson@inria.fr (Graham Andersson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Nov07.101528.3732@inria.fr> Date: Tue, 07 Nov 1995 10:15:28 GMT References: <1995Nov05.145228.2147@unam.mx> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov05.145228.2147@unam.mx>, ehernandez@unam.mx (Emi Hernández) 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. -- Graham Andersson "Hold for relay." Amiga 1200 (Blizzard 030/50) / SunOS 4.1.4 From tnakamura@purdue.edu Wed Nov 08 00:26:28 1995 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!tnakamura From: tnakamura@purdue.edu (Tyler Nakamura) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Nov08.002628.1876@purdue.edu> Date: Wed, 08 Nov 1995 00:26:28 GMT References: <1995Nov05.145228.2147@unam.mx> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov05.145228.2147@unam.mx>, ehernandez@unam.mx (Emi Hernández) writes: > Hardware disassembly report for Motorola hardware hackers. > This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- === Tyler Nakamura === Dept of Electrical Engineering, Purdue University Engineering Computer Network "A soul is not exclusive to biology."