Document: draft-krawczyk-hkdf-01 Reviewer: Avshalom Houri Review Date: 2010-03-02 IESG last call date: 2010-03-02 ? IESG telechat date: 2010-03-04 Summary: The document is ready for publication as an information RFC (see editorial). The document is a a reasonable contribution to the area of Internet engineering which is covers. Major issues: None Minor issues: None Nits/editorial comments: Section 2.2 Step1 :Extract It is not easy to understand the way that the functions are defined. For example what is the relationship between: PRK = HKDF-Extract(salt, IKM) and PRK = HMAC-Hash(salt, IKM) Why Hash is an option?