4.7 Article

An Efficient Anonymous Batch Authentication Scheme Based on HMAC for VANETs

Journal

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TITS.2016.2517603

Keywords

Certificate Revocation Lists (CRLs); hash message authentication code (HMAC); pseudonym; privacy-preserving authentication; vehicular ad hoc networks (VANETs)

Funding

  1. Key Project of NSFC Guangdong Union Foundation [U1401251]
  2. Industrial Research Project of Shaanxi Province [2015GY008]
  3. Guangxi Colleges and Universities Key Laboratory of Cloud Computing and Complex Systems [15203]
  4. China 111 Project [B08038]
  5. National Natural Science Foundation of China [61472001]
  6. Natural Science Foundation of Jiangsu Province [BE2015136]

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In vehicular ad hoc networks (VANETs), when a vehicle receives a message, the certificate revocation list (CRL) checking process will operate before certificate and signature verification. However, large communication sources, storage space, and checking time are needed for CRLs that cause the privacy disclosure issue as well. To address these issues, in this paper, we propose an efficient anonymous batch authentication scheme (ABAH) to replace the CRL checking process by calculating the hash message authentication code (HMAC). In our scheme, we first divide the precinct into several domains, in which road-side units (RSUs) manage vehicles in a localized manner. Then, we adopt pseudonyms to achieve privacy-preserving and realize batch authentication by using an identity-based signature (IBS). Finally, we use HMAC to avoid the time-consuming CRL checking and to ensure the integrity of messages that may get loss in previous batch authentication. The security and performance analysis are carried out to demonstrate that ABAH is more efficient in terms of verification delay than the conventional authentication methods employing CRLs. Meanwhile, our solution can keep conditional privacy in VANETs.

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