The Advanced Encryption Standard (AES) Cipher Algorithm in the SNMP User-based Security Model
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From: The IESG <firstname.lastname@example.org> To: IETF-Announce <email@example.com> Cc: Internet Architecture Board <firstname.lastname@example.org>, RFC Editor <email@example.com> Subject: Protocol Action: 'The AES Cipher Algorithm in the SNMP's User-based Security Model' to Proposed Standard The IESG has approved the following document: - 'The AES Cipher Algorithm in the SNMP's User-based Security Model ' <draft-blumenthal-aes-usm-09.txt> as a Proposed Standard This document has been reviewed in the IETF but is not the product of an IETF Working Group. The IESG contact person is Steve Bellovin. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-blumenthal-aes-usm-09.txt
Technical Summary The current SNMPv3 specifications describe use of DES for security. DES is not secure; it has been deprecated and replaced by AES. This document describes how to use AES with SNMPv3. Working Group Summary One obvious way to use AES would be to simply replace "DES" with "AES" and "8" (the block size) with "16". But that would expand the packet even more. This protocol uses CFB mode instead of CBC mode, to prevent packet expansion. Protocol Quality This protocol was reviewed for the IESG by Steve Bellovin and Bert Wijnen.