Pay as you Go

Foteini Baldimtsi, Gesine Hinterwälder, Andy Rupp, Anna Lysyanskaya, Chris­tof Paar, Wayne P. Burleson

5th Workshop on Hot Topics in Privacy Enhancing Technologies (HotPETs 2012) Held in conjunction with the 12th Privacy Enhancing Technologies Symposium July 13, 2012, Vigo, Spain


Until recently, the desire for user privacy in intelligent transportation systems seemed to be at odds with the cost constraints of payment tokens. There is need for low-cost payment devices that can be produced in massive quantities while sophisticated cryptographic techniques seem to be too computa- tionally intensive to be used in such devices. Our Pay-as-you-Go approach will demonstrate that it is possible to obtain privacy on very low-cost tokens, while retaining the benefits of useful data collec- tion. We explore privacy-preserving payment protocols suitable for use in public transportation and show ways to efficiently implement those protocols on potential payment devices. Pay-as-you-Go is a multi-disciplinary research project, funded by NSF, that includes a diverse team of computer scientists, electrical and computer engineers and transportation engineers from Brown University and the Univer- sity of Massachusetts.