Re: [TLS] AES-OCB in TLS [New Version Notification for draft-zauner-tls-aes-ocb-03.txt]

"Blumenthal, Uri - 0553 - MITLL" <> Wed, 05 August 2015 22:37 UTC

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From: "Blumenthal, Uri - 0553 - MITLL" <>
To: Aaron Zauner <>, TLS Mailing List <>
Thread-Topic: [TLS] AES-OCB in TLS [New Version Notification for draft-zauner-tls-aes-ocb-03.txt]
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Date: Wed, 5 Aug 2015 22:37:00 +0000
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Subject: Re: [TLS] AES-OCB in TLS [New Version Notification for draft-zauner-tls-aes-ocb-03.txt]
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Great work! I can't wait to see OCB standardized and implemented.

One thing though. There has been mentioning of Gligor patent(s) - were you able to look into that? Or perhaps Phil or Charanjit could comment on this (though technical people seldom make legal statements :)?

Sent from my BlackBerry 10 smartphone on the Verizon Wireless 4G LTE network.
  Original Message  
From: Aaron Zauner
Sent: Wednesday, August 5, 2015 17:17
To: TLS Mailing List
Subject: Re: [TLS] AES-OCB in TLS [New Version Notification for draft-zauner-tls-aes-ocb-03.txt]


A short update on the matter of IPR related to AES-OCB in TLS:

It took some time but over the past couple of weeks all IPR exemptions
have been filed by the original patent holders (Rogaway and IBM
[Jutla]). These IPR exemptions can be viewed over here:


The current document is available on the IETF website, I've made a few
minor editorial changes in my git repository [0] but not yet uploaded a
new version of the document as I'm still waiting if people would like to
see more substantial changes to the document.

I'd be happy to receive feedback on the document and am looking forward
for people to try out AES-OCB in TLS (an upcoming OpenSSL version will
ship with default-support I am told).

Thanks for your patience,