( ESNUG 313 Item 2 ) ---------------------------------------------- [3/10/99]
From: [ "Sam, I Am" ]
Subject: Synopsys Issues Vague Warning About VCS 4.2.2/5.0.1 Encryption Bug
John,
Please keep me anonymous. Hey, have you seen this?
verilog_simulation-232.html
VCS Encryption Bug
VCS 4.2.2 and VCS 5.0.1 contain a number of bug fixes, including a fix for
a source encryption bug which could compromise the security of an
encrypted model under certain unusual circumstances. This situation could
only arise in the 4.2, 4.2.1 or 5.0 versions of the product. Corresponding
versions of VCSi could also exhibit the same problem.
The updated releases of VCS namely VCS 4.2.2 and 5.0.1 will be available
for ftp download by February 26, 1999. The corresponding VCSi versions
will be available by March 5, 1999.
Synopsys highly recommends that all VCS users upgrade to the newer
versions when they are available, especially if users distribute encrypted
models. The new versions introduce a new encryption algorithm available
under a command line switch "+newprotect". Model distributors will need to
re-encrypt their existing models using the new versions of VCS while
specifying the +newprotect switch to take advantage of the improved
security and re-ship them to their end users. End user's of these new
models will also need to upgrade to the new version of the VCS software.
The new encryption algorithm will be made default by the next VCS release,
namely VCS 5.1.
Source encryption is one of the options VCS provides to distribute models
to end users. Source encryption is inherently less secure than VMC & IPX
technology which VCS also provides. Since last year Synopsys has been
supplying IPx technology free of charge to VCS customer under maintanance.
More information on IPx is available at:
http://www.synopsys.com/news/announce/press/ipx_pr.html
If you would like ftp download instructions for the new releases or if you
have any questions, please send an email to "VCS_support@synopsys.com".
Does this mean that all my source code encrypted with VCS 4.2.2 and 5.0.1 is
now readable by others???!!
- [ "Sam, I Am" ]
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