Offline Server Configuration for Zero Round Trip Transport Layer Security

Document Type Expired Internet-Draft (individual)
Author Martin Thomson 
Last updated 2016-04-21 (latest revision 2015-10-19)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Zero round trip operation in TLS relies on a client knowing about a server configuration prior to establishing a connection. TLS provides a mechanism for a server to provide a configuration during a handshake so that subsequent connections can send encrypted data in its first flight of messages. This document defines a format for this configuration information that can be used outside of TLS.


Martin Thomson (

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