From hweber@earthlink.net Sun Jun 05 16:51:50 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!hweber From: hweber@earthlink.net (Hana Weber) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jun05.165150.1950@earthlink.net> Date: Sun, 05 Jun 1994 16:51:50 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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. Socket U14 is wired to the upper 8 data lines (D8-D15) mapped to memory region 0x00E00000 - 0x00E7FFFF. Did Marcus take the decryption EPROM with him when he left the lab? -- Hana Weber Zyxel U-1496E @ 33,600 bps "We don't sign stars. We build them." From kwatanabe@mindspring.com Sun Jun 05 23:47:50 1994 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!kwatanabe From: kwatanabe@mindspring.com (Kirsty Watanabe) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jun05.234750.2307@mindspring.com> Date: Sun, 05 Jun 1994 23:47:50 GMT References: <1994Jun05.165150.1950@earthlink.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Jun05.165150.1950@earthlink.net>, hweber@earthlink.net (Hana Weber) 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! -- Kirsty Watanabe "They will send a copy in my place." Atari TT030 / System 7.5.1 From kkarlsson@pacbell.net Wed Jun 08 01:54:50 1994 Path: ashpoly!cascade!transat!ukc!fennimore!pacbell!kkarlsson From: kkarlsson@pacbell.net (Katrin Karlsson) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jun08.015450.4455@pacbell.net> Date: Wed, 08 Jun 1994 01:54:50 GMT References: <1994Jun05.165150.1950@earthlink.net> <1994Jun05.234750.2307@mindspring.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jun05.234750.2307@mindspring.com>, kwatanabe@mindspring.com (Kirsty Watanabe) writes: > If we know the plain text of Nodes 01-10, we could potentially derive the S-box substitution table via known-plaintext attack! That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Katrin Karlsson SupraFAXModem 28.8 @ 28,800 bps "Row 14. No joke." From msanchez@clari.net Thu Jun 09 16:39:50 1994 Path: ashpoly!cascade!mxgate!coyoacan!clari!msanchez From: msanchez@clari.net (Min-jun Sánchez) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1994Jun09.163950.3336@clari.net> Date: Thu, 09 Jun 1994 16:39:50 GMT References: <1994Jun05.165150.1950@earthlink.net> <1994Jun05.234750.2307@mindspring.com> <1994Jun08.015450.4455@pacbell.net> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jun08.015450.4455@pacbell.net>, kkarlsson@pacbell.net (Katrin Karlsson) writes: > That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Min-jun Sánchez Practical Peripherals 14.4 @ 33,600 bps "Hardware is temporary. The signal survives."