From eramirez@mit.edu Fri Oct 25 09:43:13 1996 Path: ashpoly!cascade!brgate!saturno!mit!eramirez From: eramirez@mit.edu (Emi Ramírez) Newsgroups: comp.sys.m68k Subject: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Oct25.094313.3289@mit.edu> Date: Fri, 25 Oct 1996 09:43:13 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. Without U14, the board can track the 14.2 Hz carrier, but cannot descramble the binary payload of Nodes 11 through 14. 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? -- Emi Ramírez Tape trading list upon request. SASE required for international mail. From tsmirnov@purdue.edu Fri Oct 25 20:27:13 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!purdue!tsmirnov From: tsmirnov@purdue.edu (Takeshi Smirnov) Newsgroups: comp.sys.m68k Subject: Re: Observation: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1996Oct25.202713.7153@purdue.edu> Date: Fri, 25 Oct 1996 20:27:13 GMT References: <1996Oct25.094313.3289@mit.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Oct25.094313.3289@mit.edu>, eramirez@mit.edu (Emi Ramírez) writes: > Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! -- Takeshi Smirnov *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0