Anonymity in Secure Access to Integrated Touristic Services Including Payment

Big cities and touristic destinations offer Touristic City Cards in order to make an step towards the SmartCity concept enabling the integration of different touristic services so as to facilitate the access to transport, cultural sites and touristic attractions to visitors. To preserve the privacy of the users and avoid the generation of users' profiles the integrated e-ticketing solution must achieve the property of anonymity. For this reason, a privacy-preserving solution to access, in a secure way, integrated services requires both a secure access protocol to purchase and validate the e-tickets and an anonymous payment system. This paper presents the integration of an anonymous payment system together with an anonymous e-ticketing system for secure access to touristic services, achieving other important properties like fairness, non-overspendig, exculpability and selective reusability.