Trust Anchor Management Protocol (TAMP)
RFC 5934

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Internet Engineering Task Force (IETF)                        R. Housley
Request for Comments: 5934                           Vigil Security, LLC
Category: Standards Track                                     S. Ashmore
ISSN: 2070-1721                                 National Security Agency
                                                              C. Wallace
                                                      Cygnacom Solutions
                                                             August 2010

                Trust Anchor Management Protocol (TAMP)

Abstract

   This document describes a transport independent protocol for the
   management of trust anchors (TAs) and community identifiers stored in
   a trust anchor store.  The protocol makes use of the Cryptographic
   Message Syntax (CMS), and a digital signature is used to provide
   integrity protection and data origin authentication.  The protocol
   can be used to manage trust anchor stores containing trust anchors
   represented as Certificate, TBSCertificate, or TrustAnchorInfo
   objects.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc5934.

Housley, et al.              Standards Track                    [Page 1]
RFC 5934                          TAMP                       August 2010

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   document authors.  All rights reserved.

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   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
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   Without obtaining an adequate license from the person(s) controlling
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   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Housley, et al.              Standards Track                    [Page 2]
RFC 5934                          TAMP                       August 2010

Table of Contents

   1. Introduction ....................................................4
      1.1. Terminology ................................................5
      1.2. Trust Anchors ..............................................5
           1.2.1. Apex Trust Anchors ..................................6
           1.2.2. Management Trust Anchors ............................7
           1.2.3. Identity Trust Anchors ..............................7
      1.3. Architectural Elements .....................................8
           1.3.1. Cryptographic Module ................................8
           1.3.2. Trust Anchor Store ..................................9
           1.3.3. TAMP Processing Dependencies ........................9
           1.3.4. Application-Specific Protocol Processing ...........10
      1.4. ASN.1 Encoding ............................................11
   2. Cryptographic Message Syntax Profile ...........................12
      2.1. ContentInfo ...............................................13
      2.2. SignedData Info ...........................................14
           2.2.1. SignerInfo .........................................15
           2.2.2. EncapsulatedContentInfo ............................16
           2.2.3. Signed Attributes ..................................16
           2.2.4. Unsigned Attributes ................................18
   3. Trust Anchor Formats ...........................................18
   4. Trust Anchor Management Protocol Messages ......................19
      4.1. TAMP Status Query .........................................21