[117925] in Cypherpunks
Re: [crisp@netcom.com: Re: chips, trust, waldoes, ultranoia etc.]
daemon@ATHENA.MIT.EDU (cyphrpnk)
Wed Sep 15 16:26:48 1999
To: cypherpunks@cyberpass.net
In-Reply-To: Your message of "Wed, 15 Sep 1999 13:04:47 CDT."
<B9B6874277EED211B1890008C707AF53010C30BA@indyexch3.indy.tce.com>
Date: Wed, 15 Sep 1999 13:10:02 -0700
From: cyphrpnk <cyphrpnk@rainbow.thinkthink.com>
Message-Id: <19990915201002.63205E12A@rainbow.thinkthink.com>
Reply-To: cyphrpnk <cyphrpnk@rainbow.thinkthink.com>
having worked at both Cadence and Mentor Graphics as well as Amdahl on EDA tools
and cell libraries ... the problem of "chipping" isnt that complex... in
ALL EDA packages(at least the ones I have had a hand in) there exists
a facility to insert glue logic into a cell lib automagically
its called autoinsert logic AND..generally it isnt protected against modifications
i.e. no checksums or hashs... it is generally ignored because it
was checked prior to the placement into auto-insert logic...
a trojan could be inserted quite easily via this method...
and probably WONT be found...
nuff said
a cypherpunk
