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Re: [TLS] Fwd: Last Call: draft-rescorla-tls-suiteb (Suite B Cipher Suites for TLS) to Informational RFC

2008-10-23 16:43:21
The IESG has received a request from an individual submitter to consider
the following document:

- 'Suite B Cipher Suites for TLS '
  <draft-rescorla-tls-suiteb-06.txt> as an Informational RFC

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action.  Please send substantive comments to the
ietf(_at_)ietf(_dot_)org mailing lists by 2008-10-23. Exceptionally,
comments may be sent to iesg(_at_)ietf(_dot_)org instead. In either case, 
please
retain the beginning of the Subject line to allow automated sorting.

These are comments on the current (-09) draft.

1) Profile naming

The document defines a "compliant profile" and a "interoperability profile". As 
anyone who works with compliance and interoperability testing knows, these two 
words are often confused in the marketplace. It would take a reader a great 
deal of effort to figure out why the "compliant profile" didn't also lead to 
interoperability, and vice versa.

Reading more carefully, it becomes clear that the "interoperability profile" is 
probably for a transition mechanism between current implementations and fully 
compliant mechanisms. That is, it allows interoperability with today's 
implementations (with restrictions), but helps lead to fully compliant 
implementations over time.

If this is true, it would be *much* clearer if the two profiles were called 
"compliant profile" and "transition profile". This would make it much easier 
for an implementer to understand, and to prevent confusion when a vendor wants 
to say that their implementation interoperates with another.

2) Document organization

The definitions for the two profiles are mixed in Section 4. While this saves a 
bit of text (and probably paper...), it makes it hard to interpret. Further, 
some of the material in Section 4 is not at all about the  
interoperability^Wtransition profile; for example, the security levels 
discussion is not related to the situation where one has for interoperability 
reasons chosen TripleDES. Section 4 should really should be just about the 
compliant profile and a new stand-alone section (new section 5) should be for 
the interoperability^Wtransition profile. Otherwise, someone reading the 
subsections of Section 4 won't be able to determine what part of the text at 
the beginning of the section it applies to.

3) Other

Not really a nit: the document consists of two profiles, but the Abstract says 
"a profile".

--Paul Hoffman, Director
--VPN Consortium
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