Recently, Zhu et al. introduced a conditional privacy-preserving authentication scheme based on certificateless aggregate signature (CLAS) for vehicular ad-hoc networks (VANETs). In this paper, we put forward a re-cryptanalysis to their CLAS and provide four concrete forgeries to disprove its security for VANETs. In addition, we also propose a provably secure CLAS scheme with a new aggregate algorithm for VANETs. This algorithm guarantees that the validities of all single signatures are publicly deduced to the validity of a concise aggregate signature. Performance analysis shows that our scheme not only supports public verification but also has short signature size and/or low computation cost compared with existing related works, which is very practical for VANETs.


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    Title :

    An Efficient and Practical Conditional Privacy-Preserving Aggregate Authentication for Vehicular Ad-Hoc Networks


    Contributors:
    Yang, Wenjie (author) / Fan, Junzhe (author) / Song, Kai (author) / Zheng, Yun (author) / Zhang, Futai (author)

    Published in:

    Publication date :

    2024-12-01


    Size :

    7401490 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English