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verilogA encryption for spectre

Fabb

Hello,

 

I would like to encrypt a compact analog model written in verilogA and executed with spectre and ultrasim.

In the spectre doc, I found that a netlist could be encrypted wtih

spectre_encrypt [-i input_file] [-o output_file] [-all]

but what about a verilogA file?

 Regards,

 

Fabrice

Parents

  • The original file is not supposed to be touched - the .vap file is the encrypted equivalent of the original file - so you could use that wherever you were using the VerilogA file. Most encryption tools work that way (e.g. pgp, gpg) - they leave you the plain text file because that's probably your master file and you don't want to lose it!

    The "ncprotect" command is supplied in both the MMSIM stream and the INCISIV stream (which is where the digital and mixed-signal simulators live). There is some documentation in the MMSIM stream - so if you run `cds_root spectre`/tools/bin/cdnshelp and then search for "ncprotect" you'll find some information. If you have the digital or AMS simulators installed and in your path, there's more information in the INCISIV stream documentation - so run `cds_root irun`/tools/bin/cdnshelp and search for "-rsakeygenerate". That's only if you really need to have specific public/private key pairs, which is quite possibly overkill for what you need - the default behaviour (as I said) is to use a Cadence key.

    Regards,

    Andew.

Reply

  • The original file is not supposed to be touched - the .vap file is the encrypted equivalent of the original file - so you could use that wherever you were using the VerilogA file. Most encryption tools work that way (e.g. pgp, gpg) - they leave you the plain text file because that's probably your master file and you don't want to lose it!

    The "ncprotect" command is supplied in both the MMSIM stream and the INCISIV stream (which is where the digital and mixed-signal simulators live). There is some documentation in the MMSIM stream - so if you run `cds_root spectre`/tools/bin/cdnshelp and then search for "ncprotect" you'll find some information. If you have the digital or AMS simulators installed and in your path, there's more information in the INCISIV stream documentation - so run `cds_root irun`/tools/bin/cdnshelp and search for "-rsakeygenerate". That's only if you really need to have specific public/private key pairs, which is quite possibly overkill for what you need - the default behaviour (as I said) is to use a Cadence key.

    Regards,

    Andew.

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