A TCP Authentication Option Extension for Payload Encryption

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Document Type Expired Internet-Draft (individual)
Author Joseph Touch 
Last updated 2016-10-20 (latest revision 2016-04-18)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes an extension to the TCP Authentication Option (TCP-AO) to encrypt the TCP segment payload in addition to providing TCP-AO's authentication of the payload, TCP header, and IP pseudoheader. This extension augments how the packet contents and headers are processed and which keys are derived, and adds a capability for in-band coordination of unauthenticated Diffie- Hellman key exchange at connection establishment. The extension preserves key rollover coordination and protection of long-lived connections.


Joseph Touch (touch@isi.edu)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)