From inakamura@berkeley.edu Sun Jul 24 14:00:27 1994 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!inakamura From: inakamura@berkeley.edu (Ines Nakamura) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul24.140027.5634@berkeley.edu> Date: Sun, 24 Jul 1994 14:00:27 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 11 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? -- Ines Nakamura SupraFAXModem 28.8 @ 28,800 bps "We don't sign stars. We build them." From imacdonald@uni-hamburg.de Sun Jul 24 17:47:27 1994 Path: ashpoly!cascade!brgate!saturno!uni-hamburg!imacdonald From: imacdonald@uni-hamburg.de (Ines MacDonald) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul24.174727.5351@uni-hamburg.de> Date: Sun, 24 Jul 1994 17:47:27 GMT References: <1994Jul24.140027.5634@berkeley.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1994Jul24.140027.5634@berkeley.edu>, inakamura@berkeley.edu (Ines Nakamura) writes: > Hardware disassembly report for Motorola hardware hackers. > This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. 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. -- Ines MacDonald "A soul is not exclusive to biology." Amiga 1200 (Blizzard 030/50) / System 7.5.1