I-D ACTION:draft-myers-ikev2-ocsp-05.txt

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	Title		: OCSP Extensions to IKEv2
	Author(s)	: M. Myers, H. Tschofenig
	Filename	: draft-myers-ikev2-ocsp-05.txt
	Pages		: 17
	Date		: 2006-10-25
	
While IKEv2 supports public key based authentication (PKI), the
   corresponding use of in-band CRLs is problematic due to unbounded
   Certificate Revocation List (CRL) size.  The size of an Online
   Certificate Status Protocol (OCSP) response is however well-bounded
   and small.  This document defines the "OCSP Content" extension to
   IKEv2.  A CERTREQ payload with "OCSP Content" identifies zero or more
   trusted OCSP responders and is a request for inclusion of an OCSP
   response in the IKEv2 handshake.  A cooperative recipient of such a
   request responds with a CERT payload containing the appropriate OCSP
   response.  This content is recognizable via the same "OCSP Content"
   identifier.

   When certificates are used with IKEv2, the communicating peers need a
   mechanism to determine the revocation status of the peer's
   certificate.  OCSP is one such mechanism.  This document applies when
   OCSP is desired and security policy prevents one of the IKEv2 peers
   from accessing the relevant OCSP responder directly.  Firewalls are
   often deployed in a manner that prevents such access by IKEv2 peers
   outside of an enterprise network.

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