[ibis-macro] Re: encryption research
- From: "Muranyi, Arpad" <arpad.muranyi@xxxxxxxxx>
- To: <ibis-macro@xxxxxxxxxxxxx>
- Date: Thu, 4 May 2006 10:14:51 -0700
A little research on the internet revealed that
Chronologic was acquired by Viewlogic in 1994 and
Viewlogic was acquired by Synopsys in 1997. See:
http://www.findarticles.com/p/articles/mi_m0EKF/is_n2190_v43/ai_19912655
Arpad
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________________________________
From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]
On Behalf Of Mike LaBonte (milabont)
Sent: Tuesday, May 02, 2006 9:12 AM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] encryption research
While searching for commercial encryption tools for EDA I I ran across some
interesting info about proprietary encryption.
This paper from the EDA Consortium gives an overview of some uses of encryption
in EDA tools. It appears that most if not all use 2 layers of encryption. The
models are encrypted using a new key each time. Then the encrypted model and
the key are wrapped into an encrypted file for which the end-user tool already
knows the key.
http://www.edac.org/downloads/resources/export/EncryptionInEDA.pdf
Ansoft has the ansip program, which encrypts VHDL files that can then be read
only by their Simplorer simulator. It tried out the encryptor. It just encrypts
the whole file, not really caring what it contains.
John Cooley wrote an article about encryption in hardware design. Of particular
interest is Table 1 "The four current ways of encrypting designs". Cooley seems
to like VMC, a tool that compiles Verilog code to a PLI written in C, with
scrambled names. This combination seems to create a fairly secure mechanism
that still works in any simulator. This may be similar to the C approach that
Arpad mentioned. The PLI interface was the key to making it work.
http://www.eetimes.com/editorial/1996/edafeature9612.html
Mike
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