Abstract
Location based services (LBSs) are promising value-added services in vehicular ad hoc networks (VANETs), which can yield substantial economic profits. To extensively deploy LBSs in VANETs, it is essential to establish an efficient privacy-preserving key management scheme. In this paper, we point out a privacy weakness in a recent key management scheme based on group signatures for LBSs in VANETs; then we propose a secure and privacy-enhanced version. In our scheme, roadside units (RSUs) act as group managers. Vehicles are distributed into groups maintained by these RSUs. If a vehicle’s member key is compromised, one just needs to update the group public key corresponding to its group manager. With this method, the member revocation and privacy leakage problems in schemes based on group signatures are solved effectively. As a result, a vehicle may enjoy LBSs efficiently without surrendering its privacy.
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Notes
- 1.
The operation system is Ubuntu 12.04 and exploiting the Miracl library [1].
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Acknowledgments and Disclaimer
Thanks goes to Chuanyan Hu and Ya Gao for the proofreading. This work was supported in part by the NSF of China under grants 61202465, 61021004, 11061130539, 91118008 and 61103222; EU FP7 under projects “DwB” and “Inter-Trust”; the Spanish Government under projects TIN2011-27076-C03-01 and CONSOLIDER INGENIO 2010 “ARES” CSD2007-0004; the Government of Catalonia under grant SGR2009-1135; the Shanghai NSF under grant no. 12ZR1443500; the Shanghai Chen Guang Program (12CG24); the Fundamental Research Funds for the Central Universities of China; the Open Project of Shanghai Key Laboratory of Trustworthy Computing (no. 07dz22304201101). J. Domingo-Ferrer was supported in part as an ICREA-Acadèmia researcher by the Government of Catalonia.
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Liu, B., Zhang, L., Domingo-Ferrer, J. (2014). On the Security of a Privacy-Preserving Key Management Scheme for Location Based Services in VANETs. In: Danger, J., Debbabi, M., Marion, JY., Garcia-Alfaro, J., Zincir Heywood, N. (eds) Foundations and Practice of Security. FPS 2013. Lecture Notes in Computer Science(), vol 8352. Springer, Cham. https://doi.org/10.1007/978-3-319-05302-8_20
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