4. Timestamping ([RFC 3161](http://tools.ietf.org/html/rfc3161))
support.
6. MAC support. Few people know that there is more MACs than just HMAC,
and even fewer, that OpenSSL supports them.
4. Timestamping ([RFC 3161](http://tools.ietf.org/html/rfc3161))
support.
6. MAC support. Few people know that there is more MACs than just HMAC,
and even fewer, that OpenSSL supports them.