Firewire is a universal interface, much like USB is. As a generic interface, it's up to the user to define what data flows through and whether the data is encrypted or not. So to answer your question, um, not sure what the question is to be honest...
Any updates on firewire and SACD?
Does anyone have any recent news about SACD and firewire? Are they moving any closer to an industry standard for this medium?