Re: [Cfrg] OCB patents expired?

Greg Rose <ggr@seer-grog.net> Fri, 01 April 2016 16:50 UTC

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From: Greg Rose <ggr@seer-grog.net>
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Date: Fri, 01 Apr 2016 09:50:02 -0700
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References: <CAHOTMVKMUC=o+znJVuACza09i2tsDZcOfkoyyqiQTeMKf9pU1Q@mail.gmail.com> <D3240AB4.29B97%uri@ll.mit.edu> <CACz1E9q5aBJwyFgH5Hi3_g_TwD5LXdNxGHCb-getKUPcSRFngA@mail.gmail.com>
To: William Whyte <wwhyte@securityinnovation.com>
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Subject: Re: [Cfrg] OCB patents expired?
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There are also patents in this area from Virgil Gligor, about the same time. I haven't looked at them recently.

Greg.

> On Apr 1, 2016, at 8:58 , William Whyte <wwhyte@securityinnovation.com> wrote:
> 
> Is there any concern about the IAPM patents due to Jutla and owned by IBM? I understand that ideas from IAPM underlie OCB, but I don't know if OCB can be implemented without infringing on those patents.
> 
> The IAPM patent was filed in 2000, so expires in 2020, AFAIK.
> 
> William
> 
> On Fri, Apr 1, 2016 at 11:24 AM, Blumenthal, Uri - 0553 - MITLL <uri@ll.mit.edu> wrote:
> According to the USPTO, patents 7046802 and 7200227 on OCB mode have expired due to non-payment.
> 
> I'm aware there's already a TLS exemption, but this seems like it should open up OCB mode for use in all protocols.
> 
> I’d love to see OCB used wider. 
> 
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