A Secure Data Sharing Scheme Based on CP-ABE in VANETs

Xinyang Deng, Tianhan Gao, Nan Guo, Kang Xie

Abstract: Vehicle ad-hoc networks (VANETs), as the special mobile ad hoc network (MANET), are able to realize the rapid interconnection among vehicles and roadside infrastructures, so as to guarantee that vehicles obtain continuous and stable network services. As one of the vital services supported by VANETs, data sharing service supports vehicles to gain interested data information (e.g. road condition information) in time and improve the driver’s experience. However, due to the wireless network communication environment, it is easy for adversaries to forge sharing data to confuse the surrounding vehicles, or invade the privacy of the drivers by collecting the data shared from the surrounding vehicles, which may mislead drivers or even cause serious traffic accidents. This paper proposes a secure data sharing scheme in VANETs. By integrating ciphertext policy attribute-based encryption mechanism (CP-ABE), the privacy of the data sender is protected and the data receiver is able to obtain reliable sharing data in time. Analysis results show that the security and performance of the scheme are improved compared with the traditional ones.