[AVT] Document writeup for draft-ietf-avt-srtp-big-aes-05
"DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com> Tue, 30 November 2010 00:03 UTC
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From: "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>
To: 'IETF AVT WG' <avt@ietf.org>
Date: Tue, 30 Nov 2010 01:04:15 +0100
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Subject: [AVT] Document writeup for draft-ietf-avt-srtp-big-aes-05
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I have just requested publication of draft-ietf-avt-srtp-big-aes-05 as proposed standard. The document writeup follows this message regards Keith ---------------------------------------- Shepherd writeup for draft-ietf-avt-srtp-big-aes-05 "The use of AES-192 and AES-256 in Secure RTP" as proposed standard. (1.a) Who is the Document Shepherd for this document? Has the Document Shepherd personally reviewed this version of the document and, in particular, does he or she believe this version is ready for forwarding to the IESG for publication? The document shepherd for this document is Keith Drage. The document shepherd has reviewed the document and believes it is ready for forwarding to the IESG for publication. Document history: - draft-mcgrew-avt-srtp-big-aes-00 was submitted 26th April 2006 and expired 28th October 2006; - draft-mcgrew-avt-srtp-big-aes-01 was submitted 5th March 2009 and expired 6th September 2009; [- draft-ietf-avt-srtp-big-aes-00 was submitted 24th August 2006 and expired 15th February 2007]; - draft-ietf-avt-srtp-big-aes-01 was submitted 6th July 2009 and expired 7th February 2010; - draft-ietf-avt-srtp-big-aes-02 was submitted 25th October 2009 and expired 28th April 2010; - draft-ietf-avt-srtp-big-aes-03 was submitted 8th March 2010 and expired 9th September 2010; - draft-ietf-avt-srtp-big-aes-04 was submitted 15th September 2010 and expires 19th March 2011. - draft-ietf-avt-srtp-big-aes-05 was submitted 29th September 2010 and expires 2nd June 2011. Call for adoption of baseline as WG item was made 10th March 2009. Working group last calls were held on the document as follows: - 15th June 2010 to complete 29th June 2010 on -03 version as proposed standard. Reviews were received from Jonathan Lennox, Glen Zorn and Cullen Jennings. Prior to WGLC the document was reviewed by John Mattsson (1.b) Has the document had adequate review both from key WG members and from key non-WG members? Does the Document Shepherd have any concerns about the depth or breadth of the reviews that have been performed? The document has been adequately reviewed (see 1a above) (1.c) Does the Document Shepherd have concerns that the document needs more review from a particular or broader perspective, e.g., security, operational complexity, someone familiar with AAA, internationalization or XML? The document has not yet had a full security directorate review. (1.d) Does the Document Shepherd have any specific concerns or issues with this document that the Responsible Area Director and/or the IESG should be aware of? For example, perhaps he or she is uncomfortable with certain parts of the document, or has concerns whether there really is a need for it. In any event, if the WG has discussed those issues and has indicated that it still wishes to advance the document, detail those concerns here. Has an IPR disclosure related to this document been filed? If so, please include a reference to the disclosure and summarize the WG discussion and conclusion on this issue. There are no concerns from the document shepherd perspective with the document. The AD has asked questions concerning the use case for these extended values. This has been responded to on the mailing list, essentially identifying that while existing SRTP mechanisms are considered secure, many contracts are now calling for the availability of extended keys. No IPR disclosures have been made against this document. (1.e) How solid is the WG consensus behind this document? Does it represent the strong concurrence of a few individuals, with others being silent, or does the WG as a whole understand and agree with it? The interest in this document has been relatively small, but it has been well reviewed by experts (and implementation experience has been applied to the document as well). Note that the document itself contains few implementable requirements directly, but does need to be taken into account in implementing the extended keys. (1.f) Has anyone threatened an appeal or otherwise indicated extreme discontent? If so, please summarise the areas of conflict in separate email messages to the Responsible Area Director. (It should be in a separate email because this questionnaire is entered into the ID Tracker.) No appeals or areas of conflict or discontent have been identified. (1.g) Has the Document Shepherd personally verified that the document satisfies all ID nits? (See the Internet-Drafts Checklist and http://tools.ietf.org/tools/idnits/). Boilerplate checks are not enough; this check needs to be thorough. Has the document met all formal review criteria it needs to, such as the MIB Doctor, media type and URI type reviews? Version 2.12.05 of ID nits identifies no issues. As a security related document, documents of this scope would normally merit a security review before publication request. No such review has yet been performed, although it is believed the document is simple enough to not be contentious. (1.h) Has the document split its references into normative and informative? Are there normative references to documents that are not ready for advancement or are otherwise in an unclear state? If such normative references exist, what is the strategy for their completion? Are there normative references that are downward references, as described in [RFC3967]? If so, list these downward references to support the Area Director in the Last Call procedure for them [RFC3967]. The document does split normative and informative references. All the normative references have been reviewed and are correctly allocated as normative references. None of these normative references constitute a down reference. (1.i) Has the Document Shepherd verified that the document IANA consideration section exists and is consistent with the body of the document? If the document specifies protocol extensions, are reservations requested in appropriate IANA registries? Are the IANA registries clearly identified? If the document creates a new registry, does it define the proposed initial contents of the registry and an allocation procedure for future registrations? Does it suggest a reasonable name for the new registry? See [RFC5226]. If the document describes an Expert Review process has Shepherd conferred with the Responsible Area Director so that the IESG can appoint the needed Expert during the IESG Evaluation? An IANA considerations section is included and the (1.j) Has the Document Shepherd verified that sections of the document that are written in a formal language, such as XML code, BNF rules, MIB definitions, etc., validate correctly in an automated checker? The only formal language is contained in the test cases. The test cases were generated in a semi-automated way, using some hand- generated inputs and a command-line application that does AES and XOR operations. Most importantly, these cases were checked by John Mattsson of Ericsson, who used completely independent software and a different, more automated methodology. (1.k) The IESG approval announcement includes a Document Announcement Write-Up. Please provide such a Document Announcement Write-Up? Recent examples can be found in the "Action" announcements for approved documents. The approval announcement contains the following sections: Technical Summary Relevant content can frequently be found in the abstract and/or introduction of the document. If not, this may be an indication that there are deficiencies in the abstract or introduction. Working Group Summary Was there anything in WG process that is worth noting? For example, was there controversy about particular points or were there decisions where the consensus was particularly rough? Document Quality Are there existing implementations of the protocol? Have a significant number of vendors indicated their plan to implement the specification? Are there any reviewers that merit special mention as having done a thorough review, e.g., one that resulted in important changes or a conclusion that the document had no substantive issues? If there was a MIB Doctor, Media Type or other expert review, what was its course (briefly)? In the case of a Media Type review, on what date was the request posted? This document describes the use of the Advanced Encryption Standard (AES) with 192 and 256 bit keys within the Secure RTP protocol. It details Counter Mode encryption for SRTP and SRTCP and a new SRTP Key Derivation Function (KDF) for AES-192 and AES-256. The document achieved consensus in the AVT working group. David McGrew, Jonathan Lennox (in the the open-source libsrtp project) and Philip Zimmermann (in libZRTP) have indicated implementations of this internet-draft.
- [AVT] Document writeup for draft-ietf-avt-srtp-bi… DRAGE, Keith (Keith)