Re: [Cfrg] OCB patents expired?

Aaron Zauner <azet@azet.org> Tue, 05 April 2016 23:34 UTC

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From: Aaron Zauner <azet@azet.org>
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Date: Wed, 06 Apr 2016 01:34:48 +0200
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To: William Whyte <wwhyte@securityinnovation.com>
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Subject: Re: [Cfrg] OCB patents expired?
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Hi,

> On 01 Apr 2016, at 17:58, 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.

There's an IPR exemption for my draft on OCB cipher-suites in TLS [0] related to IAPM from Jutla/IBM: https://datatracker.ietf.org/ipr/2647/

HTH,
Aaron

[0] https://datatracker.ietf.org/doc/draft-zauner-tls-aes-ocb/