From jkang@inria.fr Wed Mar 08 11:06:43 1995 Path: ashpoly!cascade!transat!ukc!fennimore!inria!jkang From: jkang@inria.fr (Jen Kang) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar08.110643.7568@inria.fr> Date: Wed, 08 Mar 1995 11:06:43 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. 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? -- Jen Kang SupraFAXModem 28.8 @ 19,200 bps "Extraordinary claims require extraordinary spectra." From ghernandez@unam.mx Thu Mar 09 07:59:43 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!ghernandez From: ghernandez@unam.mx (Graham Hernández) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar09.075943.8263@unam.mx> Date: Thu, 09 Mar 1995 07:59:43 GMT References: <1995Mar08.110643.7568@inria.fr> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Mar08.110643.7568@inria.fr>, jkang@inria.fr (Jen Kang) writes: > Further progress on reverse-engineering the empty socket U14 on the TWIN-68 Rev C coprocessor board. > This indicates socket U14 held a cryptographic S-box lookup table for decrypting the Stardust keystream. Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. -- Graham Hernández "There are 14 nodes and only 10 countries. Count again." Sun SparcStation 20 / SunOS 4.1.4 From lsantos@cam.ac.uk Thu Mar 09 08:47:43 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!lsantos From: lsantos@cam.ac.uk (Lucia Santos) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar09.084743.6429@cam.ac.uk> Date: Thu, 09 Mar 1995 08:47:43 GMT References: <1995Mar08.110643.7568@inria.fr> <1995Mar09.075943.8263@unam.mx> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Mar09.075943.8263@unam.mx>, ghernandez@unam.mx (Graham Hernández) writes: > Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. Using an S-box in a 27256 EPROM for single-cycle hardware substitution was standard military cipher practice in 1984. -- Lucia Santos Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------ From bmacdonald@pipeline.com Fri Mar 10 03:03:43 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!pipeline!bmacdonald From: bmacdonald@pipeline.com (Brian MacDonald) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Disassembling socket U14 firmware on the TWIN-68 board Message-ID: <1995Mar10.030343.6394@pipeline.com> Date: Fri, 10 Mar 1995 03:03:43 GMT References: <1995Mar08.110643.7568@inria.fr> <1995Mar09.075943.8263@unam.mx> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar09.075943.8263@unam.mx>, ghernandez@unam.mx (Graham Hernández) writes: > Marcus took that EPROM with him. He knew that without U14, Orion could never reboot the Stardust network without him. That's why Line 08 says: 'WHEN EVERY NODE IS WHOLE, THE CHANNEL OPENS.' It requires all physical keys. -- Brian MacDonald "When every node is whole, the channel opens." Amiga 1200 (Blizzard 030/50) / SunOS 4.1.4