Overview#
PKCS 9 (PKCS #9) is described in
RFC 2985 which describes Selected
Object Classes and
Attribute Types (Version 2.0) for use in
PKCS #6 extended
certificates,
PKCS #7 Digitally Signed messages,
PKCS #8 Private Key information, and
PKCS #10 certificate-signing requests.
There might be more information for this subject on one of the following: