Nits: * 2.1 starts with "... based on a one-way hash function described in ANS X9.63 [X963]." s/ANS/ANSI/ * Chapter 7 defines six OIDs (secg-scheme 11 1...3 and smime-alg TBD1...3) and also includes the base OIDs under which these new OIDs are attached (secg-scheme and smime-alg). Those two are not defined in this document, but the text in chapter 7 suggests so. Maybe it would be a bit clearer if the text stated explicitly which of the OIDs in the chapter are NEW, and which ones already exist and are provided for reference/context.