PKINIT Algorithm Agility

The information below is for an old version of the document
Document Type Expired Internet-Draft (kitten WG)
Last updated 2015-10-04 (latest revision 2015-04-02)
Replaces draft-ietf-krb-wg-pkinit-alg-agility
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state In WG Last Call
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document updates PKINIT, as defined in RFC 4556, to remove protocol structures tied to specific cryptographic algorithms. The PKINIT key derivation function is made negotiable, the digest algorithms for signing the pre-authentication data and the client's X.509 certificates are made discoverable. These changes provide preemptive protection against vulnerabilities discovered in the future against any specific cryptographic algorithm, and allow incremental deployment of newer algorithms.


Love Astrand (
Larry Zhu (
Margaret Cullen (
William Mills (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)