This doc defines a common purpose document signing KeyPurposeId for inclusion in the Extended Key Usage (EKU) extension of X.509 general public crucial certificates. Tadahiko Ito, Tomofumi Okubo, Sean Turner, 2022-03-31, RFC5280 specifies numerous prolonged critical goal identifiers (KeyPurposeIds) for X.509 certificates. CMP is used to enroll and further more regulate the lifecycle of X.509 certificates.