PKI Certificate Identifier Format for Devices

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Last updated 2018-05-03 (latest revision 2017-10-30)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines a standard Subject field identifier format for certificates issued to Internet of Things (IoT) devices. This will allow applications to easily and uniquely identify certificates issued to devices as opposed to certificates issue to services or users. The certificates will adhere to standard Web PKI specifications thus ensuring interoperability with existing Certificate Authorities processes and workflows, and standard client and service libraries and applications.


Owen Friel (
Richard Barnes (

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