(RFC 5877 published May 2010, subtype last updated May 2010) Type name: application Subtype name: pkix-attr-cert Required parameters: None Optional parameters: None Encoding considerations: binary Security considerations: An attribute certificate provides authorization information. An attribute certificate is most often used in conjunction with a public key certificate [RFC5280], and the two certificates should use the same encoding of the distinguished name as described in the Security Considerations of this document. Interoperability considerations: The media type will be used with HTTP to fetch attribute certificates. Other uses may emerge in the future. Published specification: RFC 5755 Applications that use this media type: The media type is used with a MIME-compliant transport to transfer an attribute certificate. Attribute certificates convey authorization information, and they are most often used in conjunction with public key certificates as defined in [RFC5280]. Additional information: Magic number(s): None File extension(s): .ac Macintosh File Type Code(s): none Person & email address to contact for further information: Russ Housley housley&vigilsec.com Intended usage: COMMON Restrictions on usage: none Author: Russ Housley Intended usage: COMMON Change controller: The IESG