Re: [TLS] Fw: New Version Notification for draft-katagi-tls-clefia-00.txt

Masanobu Katagi <Masanobu.Katagi@jp.sony.com> Tue, 05 July 2011 05:19 UTC

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Date: Tue, 05 Jul 2011 14:20:43 +0900
From: Masanobu Katagi <Masanobu.Katagi@jp.sony.com>
To: Satoru Kanno <kanno.satoru@po.ntts.co.jp>
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Cc: "Moriai, Shiho" <Shiho.Moriai@jp.sony.com>, "tls@ietf.org" <tls@ietf.org>
Subject: Re: [TLS] Fw: New Version Notification for draft-katagi-tls-clefia-00.txt
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Hi Satoru,

Thank you for your comments on our draft!

We submitted our IPR disclosure related to the document,
but it seems to take some time before it becomes available 
on the web. 

As you mentioned, our considerations on SHA-1 are written 
in Section 4 (Security Considerations) in the document.
We are happy to hear comments from TLS WG experts.

Best regards,
Masanobu Katagi

On Tue, 5 Jul 2011 12:00:46 +0900
Satoru Kanno <kanno.satoru@po.ntts.co.jp>; wrote:
> Hi Masanobu,
> 
> I have two comments for your draft.
> 
> [For IPR statement]
> I can't find an IPR statement on CLEFIA for TLS when searching for that 
> draft on the IPR Disclosure search page:
> 
> https://datatracker.ietf.org/ipr/search/?option=document_search&document_search=draft-katagi-tls-clefia
> 
> In the case of Camellia, we submitted the IPR statement for TLS as a 
> following:
> 
> https://datatracker.ietf.org/ipr/41/
> 
> Since CLEFIA is patented by SONY, I believe you need to submit an IPR  
> disclosure for this document.
> 
> 
> [For ciphersuites with SHA-1]
> Are you really suggesting that CLEFIA be used with SHA-1?
> NIST is saying not to use SHA-1 very soon. I believe these suites should 
> be removed because RFC 6209 and new I-D on Camellia are not defined on 
> these suites recently.
> Of course, I checked security considerations for ciphersuites with SHA-1 
> in your draft.
> 
> What do you and TLS folks think of these ciphersuites?
> 
> Regards,
> Satoru
> 
> (2011/07/05 9:33), Masanobu Katagi wrote:
> > Dear all,
> >
> > We have submitted the Internet draft that defines cipher suites to support CLEFIA in TLS.
> > http://tools.ietf.org/id/draft-katagi-tls-clefia-00.txt
> >
> > CLEFIA is a 128-bit block cipher presented at FSE2007 and it is now used in commercial products.
> > The algorithm of CLEFIA was published as RFC6114 in March 2011.
> > CLEFIA is a lightweight block cipher compared with AES, Camellia, and SEED.
> > We believe that CLEFIA will contribute to the Internet of Things as a lightweight cipher algorithm.
> >
> > The security and performance of CLEFIA have been evaluated through the CRYPTREC project
> > which evaluates and monitors the security of Japan e-Government recommended ciphers.
> > It also has been submitted to the ISO/IEC standard (ISO/IEC 29192, Lightweight cryptography) and it's
> > in the Final Draft International Standard.
> >
> > Any comments on this draft would be appreciated.
> >
> > Best regards,
> > Masanobu Katagi
> > Sony Corporation
> >
> > Forwarded by Masanobu Katagi<Masanobu.Katagi@jp.sony.com>;
> > ----------------------- Original Message -----------------------
> >   From:    "internet-drafts@ietf.org"<internet-drafts@ietf.org>
> >   To:      "Katagi, Masanobu"<Masanobu.Katagi@jp.sony.com>;
> >   Cc:      "Katagi, Masanobu"<Masanobu.Katagi@jp.sony.com>;,
> >            "Moriai, Shiho"<Shiho.Moriai@jp.sony.com>;
> >   Date:    Mon, 4 Jul 2011 17:51:44 +0900
> >   Subject: New Version Notification for draft-katagi-tls-clefia-00.txt
> > ----
> >
> > A new version of I-D, draft-katagi-tls-clefia-00.txt has been successfully submitted by Masanobu Katagi and posted to the IETF repository.
> >
> > Filename:	 draft-katagi-tls-clefia
> > Revision:	 00
> > Title:		 CLEFIA Cipher Suites for Transport Layer Security (TLS)
> > Creation date:	 2011-07-04
> > WG ID:		 Individual Submission
> > Number of pages: 16
> >
> > Abstract:
> >     This document specifies a set of cipher suites for the Transport
> >     Security Layer (TLS) protocol to support the CLEFIA encryption
> >     algorithm as a block cipher.  CLEFIA is a lightweight block cipher
> >     and suitable for constrained devices.
> >
> >
> >
> >
> > The IETF Secretariat
> >
> >
> > --------------------- Original Message Ends --------------------
> >
> >
> > _______________________________________________
> > TLS mailing list
> > TLS@ietf.org
> > https://www.ietf.org/mailman/listinfo/tls
> >
> 
> 
> -- 
> Satoru Kanno
> 
> Security Business Unit
> Mobile and Security Solution Business Group
> NTT Software Corporation
> 
> e-mail: kanno.satoru@po.ntts.co.jp
> 
>