From bdubois@mit.edu Sun Jul 24 08:34:49 1994 Path: ashpoly!cascade!brgate!saturno!mit!bdubois From: bdubois@mit.edu (Brian Dubois) Newsgroups: comp.sys.m68k Subject: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul24.083449.1552@mit.edu> Date: Sun, 24 Jul 1994 08:34:49 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. Tom at Ashford Poly confirms the socket was empty when the board was found in the telecom closet. -- Brian Dubois Tape trading list upon request. SASE required for international mail. From nito@purdue.edu Mon Jul 25 03:02:49 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!nito From: nito@purdue.edu (Natalia Ito) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jul25.030249.8346@purdue.edu> Date: Mon, 25 Jul 1994 03:02:49 GMT References: <1994Jul24.083449.1552@mit.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jul24.083449.1552@mit.edu>, bdubois@mit.edu (Brian Dubois) 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! -- Natalia Ito Zyxel U-1496E @ ISDN 64k bps "They will send a copy in my place."