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Stream Control Transmission Protocol (SCTP) Checksum Change (RFC3309)

IP.com Disclosure Number: IPCOM000009934D
Original Publication Date: 2002-Sep-01
Included in the Prior Art Database: 2002-Oct-01
Document File: 18 page(s) / 35K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Stone: AUTHOR [+3]

Abstract

Stream Control Transmission Protocol (SCTP) currently uses an Adler- 32 checksum. For small packets Adler-32 provides weak detection of errors. This document changes that checksum and updates SCTP to use a 32 bit CRC checksum.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 8% of the total text.

Network Working Group                                           J. Stone

Request for Comments: 3309                                      Stanford

Updates: 2960                                                 R. Stewart

Category: Standards                                        Cisco Systems

                                                                 D. Otis

                                                                SANlight

                                                          September 2002

      Stream Control Transmission Protocol (SCTP) Checksum Change

Status of this Memo

   This document specifies an Internet standards track protocol for the

   Internet community, and requests discussion and suggestions for

   improvements.  Please refer to the current edition of the "Internet

   Official Protocol Standards" (STD 1) for the standardization state

   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   Stream Control Transmission Protocol (SCTP) currently uses an Adler-

   32 checksum.  For small packets Adler-32 provides weak detection of

   errors.  This document changes that checksum and updates SCTP to use

   a 32 bit CRC checksum.

Table of Contents

   1 Introduction ...................................................  2

   2 Checksum Procedures ............................................  3

   3 Security Considerations.........................................  6

   4 IANA Considerations.............................................  6

   5 Acknowledgments ................................................  6

   6 References .....................................................  7

   Appendix .........................................................  9

   Authors' Addresses ............................................... 16

   Full Copyright Statement ......................................... 17

Stone, et. al.              Standards Track                     [Page 1]

RFC 3309                  SCTP Checksum Change            September 2002

1 Introduction

   A fundamental weakness has been detected in SCTP's current Adler-32

   checksum algorithm [STONE].  This document updates and replaces the

   Adler-32 checksum definition in [RFC 2960].  Note that there is no

   graceful transition mechanism for migrating to the new checksum.

   Implementations are expected to immediately switch to the new

   algorithm; use of the old algorithm is deprecated.

   One requirement of an effective checksum is...