public void setEncryptionCipherSuites( Set<String> cipherSuites ) {
        if ( cipherSuites == null ) {
            setEncryptionCipherSuites( new String[0] );
        } else {
            setEncryptionCipherSuites( cipherSuites.toArray( new String[ cipherSuites.size() ] ) );
        }
    }
Defines the collection of cipher suite (by name) that can be used for encryption of connections.

When non-empty, the list is intended to specify those cipher suites (from a larger collection of implementation-
supported cipher suites) that can be used to establish encryption. An empty list will cause an implementation
default to be used.

The order over which values are presented can, but is not guaranteed to, indicate preference.

@param cipherSuites An (ordered) set of cipher suite names, can be null.
xmppserver/src/main/java/org/jivesoftware/openfire/spi/ConnectionListener.java