Simple Authentication Schemes for the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) Protocols
RFC 6584

Internet Engineering Task Force (IETF)                           V. Roca
Request for Comments: 6584                                         INRIA
Category: Standards Track                                     April 2012
ISSN: 2070-1721

Simple Authentication Schemes for the Asynchronous Layered Coding (ALC)
         and NACK-Oriented Reliable Multicast (NORM) Protocols

Abstract

   This document introduces four schemes that provide per-packet
   authentication, integrity, and anti-replay services in the context of
   the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable
   Multicast (NORM) protocols.  The first scheme is based on RSA Digital
   Signatures.  The second scheme relies on the Elliptic Curve Digital
   Signature Algorithm (ECDSA).  The third scheme relies on a Group-
   keyed Message Authentication Code (MAC).  Finally, the fourth scheme
   merges the Digital Signature and group schemes.  These schemes have
   different target use cases, and they do not all provide the same
   service.

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/rfc6584.

Roca                         Standards Track                    [Page 1]
RFC 6584         Simple Authentication for ALC and NORM       April 2012

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
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   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Roca                         Standards Track                    [Page 2]
RFC 6584         Simple Authentication for ALC and NORM       April 2012

Table of Contents

   1. Introduction ....................................................4
      1.1. Scope of This Document .....................................6
      1.2. Terminology, Notations, and Definitions ....................6
   2. Authentication Scheme Identification with the ASID Field ........7
   3. RSA Digital Signature Scheme ....................................8
      3.1. Authentication Header Extension Format .....................8
      3.2. Parameters ................................................10
      3.3. Processing ................................................11
           3.3.1. Signature Processing ...............................11
           3.3.2. Anti-Replay Processing .............................12
      3.4. In Practice ...............................................13
   4. Elliptic Curve Digital Signature Scheme ........................14
      4.1. Authentication Header Extension Format ....................14
      4.2. Parameters ................................................15
      4.3. Processing ................................................15
           4.3.1. Signature Processing ...............................15
           4.3.2. Anti-Replay Processing .............................16
      4.4. In Practice ...............................................16
   5. Group-Keyed Message Authentication Code (MAC) Scheme ...........17
      5.1. Authentication Header Extension Format ....................17
      5.2. Parameters ................................................19
      5.3. Processing ................................................20
           5.3.1. Signature Processing ...............................20
           5.3.2. Anti-Replay Processing .............................20
      5.4. In Practice ...............................................20
   6. Combined Use of the RSA/ECC Digital Signatures and
      Group-Keyed MAC Schemes ........................................21
      6.1. Authentication Header Extension Format ....................21
      6.2. Parameters ................................................23
      6.3. Processing ................................................23