HMac

HMac function returns encrypted string. Not a Boolean value as description states.

Would it be possible to list the supported algorithms and encodings along with the defaults? I'm assuming they would match with Hash(). Also shouldn't the category be "Security functions"?

The Mac algorithms are documented here: http://docs.oracle.com/javase/6/docs/technotes/guides/security/StandardNames.html#Mac.

HMACRIPEMD160 algorithm they used in sample is not listed at docs.oracle.com article. So, ColdFusion's algorithm names must be different.

Algorithms from this article http://msdn.microsoft.com/en-us/library/system.security.cryptography.h mac.aspx recognized with HMac():

HMACMD5, HMACRIPEMD160, HMACSHA1, HMACSHA256, HMACSHA384, HMACSHA512