Subject: [CFRG] Next actions for I-D: draft-irtf-cfrg-cpace-03 // We would appreciate your feedback !

From: Björn Haase <[email-masked]>
Date: Fri, 3 Dec 2021 13:43:05 +0000

Dear CFRG,

we would like to start a broader review of the current CPace draft-irtf-cfrg-cpace-03 before Christmas and would welcome any feedback on the draft's current version.

We would be happy if we could integrate your opinions and feedback already before the next larger review round as to lower the number of cycles that we will need for getting the draft in a good shape.

Best regards,

Björn

(on behalf of all authors.)

P.S.:

FYI: The slides and the talk regarding the latest CPace security analysis paper at asiacrypt is now also openly available online https://asiacrypt.iacr.org/2021/program.php.

Mit freundlichen Grüßen I Best Regards 

Dr. Björn Haase 

Senior Expert Electronics | TGREH Electronics Hardware

Endress+Hauser Liquid Analysis

Endress+Hauser Conducta GmbH+Co.KG | Dieselstrasse 24 | 70839 Gerlingen | Germany
Phone: +49 7156 209 377 | Fax: +49 7156 209 221
[email-masked] |  www.ehla.endress.com 

Endress+Hauser Conducta GmbH+Co.KG
Amtsgericht Stuttgart HRA 201908
Sitz der Gesellschaft: Gerlingen
Persönlich haftende Gesellschafterin:
Endress+Hauser Conducta Verwaltungsgesellschaft mbH
Sitz der Gesellschaft: Gerlingen
Amtsgericht Stuttgart HRA 201929
Geschäftsführer: Dr. Manfred Jagiella

Gemäss Datenschutzgrundverordnung sind wir verpflichtet, Sie zu informieren, wenn wir personenbezogene Daten von Ihnen erheben.
Dieser Informationspflicht kommen wir mit folgendem Datenschutzhinweis (https://www.endress.com/de/cookies-endress+hauser-website) nach.

Disclaimer: 

The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you receive this in error, please contact the sender and delete the material from any computer. This e-mail does not constitute a contract offer, a contract amendment, or an acceptance of a contract offer unless explicitly and conspicuously designated or stated as such.

-----Ursprüngliche Nachricht-----
Von: CFRG <[email-masked]> Im Auftrag von Julia Hesse
Gesendet: Dienstag, 16. November 2021 09:00
An: [email-masked]
Betreff: Re: [CFRG] I-D Action: draft-irtf-cfrg-cpace-03.txt

Dear CFRG,

the cpace draft did undergo some major restructuring lately, and we 
incorporated the latest findings from the security analyses in [1],[2]. 
We would appreciate a review by CFRG at this point.

In particular, we were asking ourselves the following questions:

- Is the “object” notation for hash function and group environment clear?

- Should we explicitly consider both initiator/responder + parallel 
version or only focus on one setting for conciseness?

- What is the best way for prepending field lengths to octet strings? 
(Current suggestion: UTF8)

- Overall length: is it too long? Any suggestions for shortening?

Best,
Julia (on behalf of all authors)