FIDES: A trust-based framework for secure user incentivization in participatory sensing

Participatory sensing (PS) has recently attracted tremendous attention given its potential for a wide variety of sensing applications. Due to the fact that PS systems rely completely on the data provided by the users, incentivizing users´ active participation while guaranteeing data reliability is paramount to effectively employ PS systems in practical scenarios. In this paper, we first define a set of attacks which compromise data reliability of existing PS applications. Next, we propose a scalable and secure trust-based framework, called FIDES, which relies on the concept of mobile security agents (MSAs) and Josang´s trust model to rule out incorrect reports and reward reliable users. By simulating the FIDES framework on mobility traces of taxi cabs in San Francisco, we demonstrate that FIDES secures the PS system from the proposed attacks, guarantees high data reliability, and saves significant amount of revenue with respect to existing reward mechanisms.