Re: [TLS] draft on new TLS key exchange

Steven Bellovin <smb@cs.columbia.edu> Sat, 29 October 2011 17:36 UTC

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From: Steven Bellovin <smb@cs.columbia.edu>
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Cc: dhalasz@intwineenergy.com, tls@ietf.org
Subject: Re: [TLS] draft on new TLS key exchange
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I don't know of any licensees, though of course since it went to Lucent
when AT&T fissioned I have little knowledge of what happened after 1996-7.

On Oct 29, 2011, at 12:56 46PM, Anders Rundgren wrote:

> The "Window of opportunity" has also since long time passed.
> It must have been a very "profitable" patent :-) :-)
> 
> Anders
> 
> On 2011-10-29 18:48, Steven Bellovin wrote:
>>> Speaking of SRP, I'm told the EKE patent expired a few days ago.
>> 
>> 
>> Speaking only for myself and not for Alcatel-Lucent, I think you're
>> correct -- http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5,241,599.PN.&OS=PN/5,241,599&RS=PN/5,241,599
>> shows it was filed on October 2, 1991; my understanding is that was valid
>> for 20 years from date of filing.  (It might have fallen into the category
>> of "the later of that date or 17 years from date of issue, but that would
>> have yielded an expiration date of August 31, 2010.)
>> 
>> 		--Steve Bellovin, https://www.cs.columbia.edu/~smb
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> TLS mailing list
>> TLS@ietf.org
>> https://www.ietf.org/mailman/listinfo/tls
>> 
> 
> 


		--Steve Bellovin, https://www.cs.columbia.edu/~smb