A New Internet-Draft is available from the on-line Internet-Drafts
directories. This draft is a work item of the IP Security Protocol Working
Group of the IETF.
Title : IP Authentication Header
Author(s) : S. Kent, R. Atkinson
Filename : draft-ietf-ipsec-new-auth-00.txt
Pages : 15
Date : 03/28/1997
The IP Authentication Header (AH) is used to provide connectionless
integrity and data origin authentication for IP datagrams (hereafter
referred to as just "authentication"), and to provide protection against
replays. This latter, optional service may be selected when a Security
Association is established. AH provides authentication for as much of the
IP header as possible, as well as for upper level protocol data. However,
some IP header fields may change in transit and the value of these fields,
when the packet arrives at the receiver, may not be predictable by the
transmitter. The values of such fields cannot be protected by AH. Thus
the protection provided to the IP header by AH is somewhat piecemeal.
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