Privacy in public transport systems is poorer than it has to be, and can be enhanced. The following describes a privacy-preserving ticketing system. https://li

Privacy in public transport systems is poorer than it has to be, and can be enhanced. The following describes a privacy-preserving ticketing system. https://link.springer.com/chapter/10.1007/978-3-319-20810-7_9?fromPaywallRec=true https://link.springer.com/chapter/10.1007/978-3-319-20810-7_... No doubt many people are aware that card passes are potential trackers, and that may be why a third or so of the ridership pays no fare.