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CoDTLS: DTLS handshakes over CoAP

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Lars Schmertmann, Klaus Hartke , Carsten Bormann
Last updated 2015-02-16 (Latest revision 2014-08-15)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


The Datagram Transport Layer Security protocol, DTLS, is usually transported over UDP. In Constrained Node Networks, there may be considerable limitations on the packet delivery rates and on practically usable packet sizes. Applications often can control the size and retransmission requirements of their data packets, but the DTLS handshake is out of scope for such application optimizations. This specification defines how to perform a DTLS handshake on top of the CoAP protocol. The resulting DTLS connection may then be used for instance for transporting CoAP, or as a source of keying material. The latter case is particularly interesting if the CoAP exchanges transporting the DTLS handshake messages traverse CoAP proxies.


Lars Schmertmann
Klaus Hartke
Carsten Bormann

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