Triangulation for Moble Payment Systems

Nick thinks about secure systems and the new cell phone movie ticket:

"Payment systems, just like good authentication systems, are triangular. Even cash has a dotted line triangle back to the faith and trust in the government that backs them. This system is potentially more secure than contactless payment systems because you can use strong public key encryption and two-factor authentication on the cell phone. With WiKID you could also present a one-time passcode for use in web-based payments."