Chinese WAPI protocol?

[Steven M. Bellovin]

On Wed, 14 Jun 2006 12:33:46 -0700, Ben Pfaff <blp at cs.stanford.edu> wrote:

> David Wagner <daw at cs.berkeley.edu> writes:
> 
> > The specification is secret and confidential.  It uses the SMS4
> > block cipher, which is secret and patented. [*]
> 
> "Secret" and "patented" are mutually exclusive.

Perhaps not.  The Clipper chip may have been patented -- see
http://catless.ncl.ac.uk/Risks/15.48.html#subj1 for details.

I also don't know what Chinese law is on the subject.

	--Steven M. Bellovin, http://www.cs.columbia.edu/~smb

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