Evaluation: draft-blumenthal-aes-usm - The AES Cipher Algorithm in the SNMP's User-based Security Model

[IESG Secretary <iesg-secretary@ietf.org>]

--------

Last Call to expire on: 2003-04-25

        Please return the full line with your position.

                      Yes  No-Objection  Discuss  Abstain
Harald Alvestrand    [   ]     [   ]     [   ]     [   ]
Steve Bellovin       [ X ]     [   ]     [   ]     [   ]
Randy Bush           [   ]     [   ]     [   ]     [   ]
Bill Fenner          [   ]     [   ]     [   ]     [   ]
Ned Freed            [   ]     [   ]     [   ]     [   ]
Ted Hardie           [   ]     [   ]     [   ]     [   ]
Russ Housley         [   ]     [   ]     [   ]     [   ]
Allison Mankin       [   ]     [   ]     [   ]     [   ]
Thomas Narten        [   ]     [   ]     [   ]     [   ]
Jon Peterson         [   ]     [   ]     [   ]     [   ]
Margaret Wasserman   [   ]     [   ]     [   ]     [   ]
Bert Wijnen          [   ]     [   ]     [   ]     [   ]
Alex Zinin           [   ]     [   ]     [   ]     [   ]

2/3 (9) Yes or No-Objection opinions needed to pass.

DISCUSSES AND COMMENTS:
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^L 
---- following is a DRAFT of message to be sent AFTER approval ---
From: The IESG <iesg-secretary@ietf.org>
To: IETF-Announce:;
Cc: Internet Architecture Board <iab@iab.org>,
    RFC Editor <rfc-editor@rfc-editor.org>
Subject: Protocol Action: 'The AES Cipher Algorithm in the SNMP's 
         User-based Security Model' to Proposed Standard 

The IESG has approved following document:

- 'The AES  Cipher Algorithm in the SNMP's User-based Security Model'
   <draft-blumenthal-aes-usm-06.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.

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.