Use of Timed Efficient Stream Loss-Tolerant Authentication (TESLA) in the Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable Multicast (NORM) Protocols
RFC 5776
Internet Engineering Task Force (IETF) V. Roca
Request for Comments: 5776 A. Francillon
Category: Experimental S. Faurite
ISSN: 2070-1721 INRIA
April 2010
Use of Timed Efficient Stream Loss-Tolerant Authentication (TESLA) in
the Asynchronous Layered Coding (ALC) and
NACK-Oriented Reliable Multicast (NORM) Protocols
Abstract
This document details the Timed Efficient Stream Loss-Tolerant
Authentication (TESLA) packet source authentication and packet
integrity verification protocol and its integration within the
Asynchronous Layered Coding (ALC) and NACK-Oriented Reliable
Multicast (NORM) content delivery protocols. This document only
considers the authentication/integrity verification of the packets
generated by the session's sender. The authentication and integrity
verification of the packets sent by receivers, if any, is out of the
scope of this document.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for examination, experimental implementation, and
evaluation.
This document defines an Experimental Protocol for the Internet
community. 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). Not
all documents approved by the IESG are a candidate for any level of
Internet Standard; see 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/rfc5776.
Roca, et al. Experimental [Page 1]
RFC 5776 TESLA in ALC and NORM April 2010
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Roca, et al. Experimental [Page 2]
RFC 5776 TESLA in ALC and NORM April 2010
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Scope of This Document . . . . . . . . . . . . . . . . . . 6
1.2. Conventions Used in This Document . . . . . . . . . . . . 7
1.3. Terminology and Notations . . . . . . . . . . . . . . . . 7
1.3.1. Notations and Definitions Related to Cryptographic
Functions . . . . . . . . . . . . . . . . . . . . . . 7
1.3.2. Notations and Definitions Related to Time . . . . . . 8
2. Using TESLA with ALC and NORM: General Operations . . . . . . 9
2.1. ALC and NORM Specificities That Impact TESLA . . . . . . . 9
2.2. Bootstrapping TESLA . . . . . . . . . . . . . . . . . . . 10
2.2.1. Bootstrapping TESLA with an Out-Of-Band Mechanism . . 10
2.2.2. Bootstrapping TESLA with an In-Band Mechanism . . . . 11
2.3. Setting Up a Secure Time Synchronization . . . . . . . . . 11
2.3.1. Direct Time Synchronization . . . . . . . . . . . . . 12
2.3.2. Indirect Time Synchronization . . . . . . . . . . . . 12
2.4. Determining the Delay Bounds . . . . . . . . . . . . . . . 13
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