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This draft is a work item of the TCP Maintenance and Minor Extensions Working Group of the IETF.
Title : The TCP Authentication Option
Author(s) : J. Touch, A. Mankin, R. Bonica
Filename : draft-ietf-tcpm-tcp-auth-opt-08.txt
Pages : 45
Date : 2009-10-28
This document specifies the TCP Authentication Option (TCP-AO), which
obsoletes the TCP MD5 Signature option of RFC-2385 (TCP MD5). TCP-AO
specifies the use of stronger Message Authentication Codes (MACs),
protects against replays even for long-lived TCP connections, and
provides more details on the association of security with TCP
connections than TCP MD5. TCP-AO is compatible with either static
master key tuple (MKT) configuration or an external, out-of-band MKT
management mechanism; in either case, TCP-AO also protects
connections when using the same MKT across repeated instances of a
connection, using traffic keys derived from the MKT, and coordinates
MKT changes between endpoints. The result is intended to support
current infrastructure uses of TCP MD5, such as to protect long-lived
connections (as used, e.g., in BGP and LDP), and to support a larger
set of MACs with minimal other system and operational changes. TCP-AO
uses its own option identifier, even though used mutually exclusive
of TCP MD5 on a given TCP connection. TCP-AO supports IPv6, and is
fully compatible with the proposed requirements for the replacement
of TCP MD5.
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