Efficient certificateless anonymous multi-receiver encryption scheme for mobile devices
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With the popularity of mobile devices, how to enhance the security and privacy in wireless communications has gained comprehensive attention. Many cryptographic schemes have been introduced for practical applications. In the multi-receiver encryption (MRE) scheme, a sender is allowed to generate the same ciphertext for a designed group of receivers. Any receiver can get the plaintext by decrypting the ciphertext; however, the real identity of receiver cannot be known by other receivers. Due to the above advantage, the MRE scheme can be used to protect the receiver’s privacy. Recently, the certificateless anonymous multi-receiver encryption (CLAMRE) scheme using the bilinear paring was introduced to solve the certificate management problem existing in MRE schemes based on the public key infrastructure and the private key escrow problem existing in MRE schemes based on identity-based cryptography. However, previous CLAMRE scheme using the bilinear paring is not suitable for mobile devices because the number of bilinear paring operations and Hash-to-Point (HTP) operations executed by the sender increases linearly as the increase of the receivers’ number. In this paper, an efficient CLAMRE scheme based on elliptic curve cryptography for mobile devices is proposed to improve performance. Because no bilinear paring or HTP operation is involved in the process of encryption, the proposed CLAMRE scheme has much less computation cost than the latest CLAMRE scheme. Security analysis shows the proposed CLAMRE scheme is provably secure in the random oracle model.
KeywordsMulti-receiver encryption Bilinear pairing Certificateless encryption Anonymity Provable security
We would like to thank anonymous editors and reviewers for their invaluable comments and suggestions that have resulted in the improvement of completeness and readability. The work of D. He was supported by the National Natural Science Foundation of China (Nos. 61501333, 61572379), the Research Fund of the Guangxi Key Laboratory of Trusted Software under Grant (No. kx201529), the Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology (CICAEET) fund, the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions and the Natural Science Foundation of Hubei Province of China (No. 2015CFB257). The work of L. Wang was supported by the National Natural Science Foundation of China (No. U1536204) and the National High-tech R&D Program of China (863 Program) (No. 2015AA016004).
Compliance with ethical standards
Conflicts of interest
The authors declare that they have no conflict of interest.
This article does not contain any studies with human participants or animals performed by any of the authors.
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