@misc{rfc9883, series = {Request for Comments}, number = 9883, howpublished = {RFC 9883}, publisher = {RFC Editor}, doi = {10.17487/RFC9883}, url = {https://www.rfc-editor.org/info/rfc9883}, author = {Russ Housley}, title = {{An Attribute for Statement of Possession of a Private Key}}, pagetotal = 17, year = 2025, month = oct, abstract = {This document specifies an attribute for a statement of possession of a private key by a certificate subject. As part of X.509 certificate enrollment, a Certification Authority (CA) typically demands proof that the subject possesses the private key that corresponds to the to-be-certified public key. In some cases, a CA might accept a signed statement from the certificate subject. For example, when a certificate subject needs separate certificates for signature and key establishment, a statement that can be validated with the previously issued signature certificate for the same subject might be adequate for subsequent issuance of the key establishment certificate.}, }