ABAC: Anonymous Bilateral Access Control Protocol with Traceability for Fog-Assisted Mobile Crowdsensing

Fog-assisted mobile crowdsensing (MCS) has been applied to various applications to improve the quality of big data services. As two indispensable services of fog-assisted MCS, privacy protection and flexible access control have attracted widespread attention. Although there are already some cryptographic solutions to address the above concerns, they still have some limitations in the development of mobile crowdsensing, such as lacking anonymous protection and only providing unilateral access control (i.g., who can read). Thus, we propose an anonymous bilateral access control protocol (ABAC) with traceability for secure big data transmission in fog-assisted MCS. By combining the designed access control encryption scheme and an efficient group signature, ABAC not only protects the identity privacy of participants but also achieves access control in terms of reading and writing simultaneously. Security analysis and experimental evaluations demonstrate that ABAC fits the requirements of fog-assisted MCS.