Secure Message Protocol 

Certificate Management Library
* Builds and validates X.509 certification paths and CRLs
* Provides local database functions
* Provides remote directory retrieval via LDAP

S/MIME Freeware Library
* Implements IETF S/MIME v3 security heading
* Security label, signed receipts, mail list support

Access Control Library
* Provide Rule Based Access Control using security labels and authorizations as per SDN.801
* Process Attribute Certificates and X.509 Certificates
* Meets Defense Message System and Bridge Certification Authority Phase II Requirements

Enhanced SNACC ASN.1
* Implements Distinguished Encoding Rules