Shepherd writeup

Proto write up by Magnus Westerlund for 
Guidelines for the use of Variable Bit Rate Audio with Secure RTP
with the intended publication as BCP

  (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? 

Magnus Westerlund is Shepherd and has read this version (03) of the 
document and believe it is ready for publication as BCP.

  (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?  
Yes, the review has been adequate. Both the transport and security people 
active in the WG has reviewed it.         

  (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? 

  (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. 


  (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?   
It is a strong consensus from relatively few inviduals. But that give the Shepherd
no significant concern.         

  (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.) 

  (1.g) Has the Document Shepherd personally verified that the 
        document satisfies all ID nits? (See the Internet-Drafts Checklist 
        and 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? 
Yes the document has been ID-nits checked and the Checklist walked through.        

  (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]. 
Yes, split and no down-refs. 

  (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? 
No IANA actions and that is written.        

  (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? 
No formal language        

  (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 

This memo discusses potential security issues that arise when using variable bit 
rate audio with the secure RTP profile. When using SRTP with voice streams 
compressed using variable bit rate (VBR) codecs, the length of the compressed 
packets will depend on the characteristics of the speech signal.  This 
variation in packet size will leak a small amount of information about the 
contents of the speech signal.  Guidelines to mitigate these issues are 

     Working Group Summary 
        There was early on significant debate on how big a security issue
        this problem really was. But it was agreed on the need to document 
        the issue and how the issue can be mitigated. Since then there has
        been good consensus on the document. 

     Document Quality 
        This document has gotten reasonable review from people with both 
        RTP and Security focus. The quality of the document is good.