(RFC 3830 published August 2004, subtype last updated August 2004)

MIME media type name              : application
MIME subtype name                 : mikey
Required parameters               : none
Optional parameters               : version
          version: The MIKEY version number of the enclosed message
             (e.g., 1). If not present, the version defaults to 1.
Encoding Considerations           : binary, base64 encoded
Security Considerations           : see section 9 in this memo
Interoperability considerations   : none
Published specification           : this memo