Skip to main content

X.509 Public Key Infrastructure Certificates for the Constrained Application Protocol (CoAP)

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Pawani Porambage, Corinna Schmitt , Andrei Gurtov , Stefanie Gerdes
Last updated 2014-08-18 (Latest revision 2014-02-14)
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This Internet-Draft is no longer active.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 Constrained Application Protocol (CoAP) is a web transfer protocol designed for resource limited nodes in constrained networks. For securing the protocol, CoAP defines a binding to Datagram Transport Layer Security (DTLS) with four security modes. One of them is the Certificate mode where the device has an asymmetric key pair with an X.509 certificate. However, the intrinsic properties of x.509 certificates impede the application on the resource constrained nodes. This draft describes the necessary adjustments and derives a modified profile for X.509 certificates to cope with the resource limitations of low-power low-performing devices


Pawani Porambage
Corinna Schmitt
Andrei Gurtov
Stefanie Gerdes

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