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        RFC 3029

        Title:      Internet X.509 Public Key Infrastructure Data
                    Validation and Certification Server Protocols
        Author(s):  C. Adams, P. Sylvester, M. Zolotarev,
                    R. Zuccherato
        Status:     Experimental
        Date:       February 2001
        Mailbox:    cadams@entrust.com, mzolotarev@baltimore.com,
                    peter.sylvester@edelweb.fr,
                    robert.zuccherato@entrust.com
        Pages:      51
        Characters: 107347
        Updates/Obsoletes/SeeAlso:    None

        I-D Tag:    draft-ietf-pkix-dcs-07.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc3029.txt


This document describes a general Data Validation and Certification
Server (DVCS) and the protocols to be used when communicating with
it.  The Data Validation and Certification Server is a Trusted Third
Party (TTP) that can be used as one component in building reliable
non-repudiation services.

Useful Data Validation and Certification Server responsibilities in a
PKI are to assert the validity of signed documents, public key
certificates, and the possession or existence of data.

Assertions created by this protocol are called Data Validation
Certificates (DVC).

We give examples of how to use the Data Validation and Certification
Server to extend the lifetime of a signature beyond key expiry or
revocation and to query the Data Validation and Certification Server
regarding the status of a public key certificate.  The document
includes a complete example of a time stamping transaction.

This document is a product of the Public-Key Infrastructure (X.509)
Working Group of the IETF.

This memo defines an Experimental Protocol for the Internet community.
It does not specify an Internet standard of any kind.  Discussion and
suggestions for improvement are requested.  Distribution of this memo
is unlimited.

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