[28091] in cryptography@c2.net mail archive
Re: Chinese WAPI protocol?
daemon@ATHENA.MIT.EDU (Steven M. Bellovin)
Wed Jun 14 21:02:49 2006
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Wed, 14 Jun 2006 23:12:50 +0100
From: "Steven M. Bellovin" <smb@cs.columbia.edu>
To: blp@cs.stanford.edu
Cc: cryptography@metzdowd.com
In-Reply-To: <87irn3edlx.fsf@benpfaff.org>
On Wed, 14 Jun 2006 12:33:46 -0700, Ben Pfaff <blp@cs.stanford.edu> wrote:
> David Wagner <daw@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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