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A Pairing-based Homomorphic Encryption Scheme for Multi-User Settings

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  • Zhang Wei

    (Engineering University of Chinese Armed Police Force, Xi'an, China)

Abstract

A new method is presented to privately outsource computation of different users. As a significant cryptographic primitive in cloud computing, homomorphic encryption (HE) can evaluate on ciphertext directly without decryption, thus avoid information leakage. However, most of the available HE schemes are single-user, which means that they could only evaluate on ciphertexts encrypted by the same public key. Adopting the idea of proxy re-encryption, and focusing on the compatibility of computation, the authors provide a pairing-based multi-user homomorphic encryption scheme. The scheme is a somewhat homomorphic one, which can do infinite additions and one multiplication operation. Security of the scheme is based on subgroup decision problem. The authors give a concrete security model and detailed security analysis.

Suggested Citation

  • Zhang Wei, 2016. "A Pairing-based Homomorphic Encryption Scheme for Multi-User Settings," International Journal of Technology and Human Interaction (IJTHI), IGI Global, vol. 12(2), pages 72-82, April.
    • Handle: RePEc:igg:jthi00:v:12:y:2016:i:2:p:72-82
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