Steve, thanks for your help. Do you ( or anyone else ) know what regulation/law
specifies that signing algorithms are not subject to export restrictions? Can you
point me to a web site where I can verify this for my own piece of mind?
Bob.
Dr Stephen Henson wrote:
> Bob Ollila wrote:
> >
> > I would like to use DSA as a means of limiting use of a piece of software to those
>with appropriate permission. Here's how it would work: A user of the software is
>given a password which consists of an ipaddress where his app is to run encrypted
>using the private key. When the app runs it uses the public key to decrypt the
>password and verify the the localhost is a licensed user of the app.
>
> DSA is not an encryption algorithm it is a signing only algorithm. As
> such there aren't any export restriction on key size.
>
> However your application could just as easily work with a signature. For
> example the app would contain the relevant info and a signature and then
> verify the signature against a hard coded public key.
>
> Steve.
> --
> Dr Stephen N. Henson. http://www.drh-consultancy.demon.co.uk/
> Personal Email: [EMAIL PROTECTED]
> Senior crypto engineer, Celo Communications: http://www.celocom.com/
> Core developer of the OpenSSL project: http://www.openssl.org/
> Business Email: [EMAIL PROTECTED] PGP key: via homepage.
>
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