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The Advanced Encryption Standard (AES) Cipher Algorithm in the SNMP User-based Security Model (RFC3826)

IP.com Disclosure Number: IPCOM000029108D
Original Publication Date: 2004-Jun-01
Included in the Prior Art Database: 2019-Feb-11
Document File: 16 page(s) / 23K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

U. Blumenthal: AUTHOR [+2]

Related Documents

10.17487/RFC3826: DOI

Abstract

This document describes a symmetric encryption protocol that supplements the protocols described in the User-based Security Model (USM), which is a Security Subsystem for version 3 of the Simple Network Management Protocol for use in the SNMP Architecture. The symmetric encryption protocol described in this document is based on the Advanced Encryption Standard (AES) cipher algorithm used in Cipher FeedBack Mode (CFB), with a key size of 128 bits. [STANDARDS-TRACK]

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Network Working Group U. Blumenthal Request for Comments: 3826 Lucent Technologies Category: Standards Track F. Maino Andiamo Systems, Inc. K. McCloghrie Cisco Systems, Inc. June 2004

The Advanced Encryption Standard (AES) Cipher Algorithm in the SNMP User-based Security Model

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 (2004).

Abstract

This document describes a symmetric encryption protocol that supplements the protocols described in the User-based Security Model (USM), which is a Security Subsystem for version 3 of the Simple Network Management Protocol for use in the SNMP Architecture. The symmetric encryption protocol described in this document is based on the Advanced Encryption Standard (AES) cipher algorithm used in Cipher FeedBack Mode (CFB), with a key size of 128 bits.

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Goals and Constraints. . . . . . . . . . . . . . . . . 2 1.2. Key Localization . . . . . . . . . . . . . . . . . . . 3 1.3. Password Entropy and Storage . . . . . . . . . . . . . 3 2. Definitions. . . . . . . . . . . . . . . . . . . . . . . . . 4 3. CFB128-AES-128 Symmetric Encryption Protocol . . . . . . . . 5 3.1. Mechanisms . . . . . . . . . . . . . . . . . . . . . . 5 3.1.1. The AES-based Symmetric Encryption Protocol . . 6 3.1.2. Localized Key, AES Encryption Key and Initialization Vector . . . . . . . . . . . . . 7 3.1.3. Data Encryption . . . . . . . . . . . . . . . . 8 3.1.4. Data Decryption . . . . . . . . . . . . . . . . 8

Blumenthal, et al. Standards Track [Page 1]

RFC 3826 AES for SNMP’s USM June 2004

3.2. Elements of the AES Privacy Protocol . . . . . . . . . 9 3.2.1. Users . . . . . . . . . . . . . . . . . . . . . 9 3.2.2. msgAuthoritativeEngineID. . . . . . . . . . . . 9 3.2.3. SNMP Messages Using this Privacy Protocol . . . 10 3.2.4. Services provided by the AES Privacy Modules. . 10 3.3. Elements of Procedure. . . . . . . . . . . . . . . . . 11 3.3.1. Processing an Outgoing Message. . . . . . . . . 12 3.3.2. Processing an Incoming Message. . . . . . . . . 12 4. Security Considerations. . . . . . . . . . . . . . . . . . . 13 5. IANA Considerations. . . . . . . . . . . . . . . . . . . . . 13 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 14 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 14 7.1. Normative References . . . . . . . . . . . . . . . . . 14 7.2. Informative References . . . . . . . . . . . . . . . . 14 8. Authors’ Addresses . . . . . . . . . . . . . . . . . . . . . 15 9. Full Copyright Statement . . . . . . . . . . . . . . . . . . 16

1. Introduction

Within the Arch...

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