{"draft":"draft-ietf-lamps-automation-keyusages-08","doc_id":"RFC9809","title":"X.509 Certificate Extended Key Usage (EKU) for Configuration, Updates, and Safety-Critical Communication","authors":["H. Brockhaus","D. Goltzsche"],"format":["HTML","TEXT","PDF","XML"],"page_count":"12","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Limited Additional Mechanisms for PKIX and SMIME","abstract":"RFC 5280 defines the Extended Key Usage (EKU) extension and specifies\r\nseveral extended key purpose identifiers (KeyPurposeIds) for use with\r\nthat extension in X.509 certificates.  This document defines\r\nKeyPurposeIds for general-purpose and trust anchor configuration\r\nfiles, for software and firmware update packages, and for\r\nsafety-critical communication to be included in the EKU extension of\r\nX.509 v3 public key certificates.","pub_date":"July 2025","keywords":["Industrial Automation","ERJU","extended key usage","extension","PKI"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9809","errata_url":null}