From msuzuki@mindspring.com Thu Aug 24 22:57:55 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!mindspring!msuzuki From: msuzuki@mindspring.com (Marisol Suzuki) Newsgroups: comp.sys.m68k Subject: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug24.225755.3365@mindspring.com> Date: Thu, 24 Aug 1995 22:57:55 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Tracing the address decoder lines on the motherboard reveals what was supposed to be in socket U14. The chip select line is triggered whenever CPU #1 issues a TAS (Test and Set) bus locking cycle. 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? -- Marisol Suzuki -- MindSpring Enterprises "Tape doesn't lie at 02:14. Ears do." From ksantos@netcom.com Sat Aug 26 09:11:55 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!ksantos From: ksantos@netcom.com (Kirsty Santos) Newsgroups: comp.sys.m68k Subject: Re: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Aug26.091155.6525@netcom.com> Date: Sat, 26 Aug 1995 09:11:55 GMT References: <1995Aug24.225755.3365@mindspring.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Aug24.225755.3365@mindspring.com>, msuzuki@mindspring.com (Marisol Suzuki) 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! Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Kirsty Santos *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0