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Chosen-Ciphertext Secure Proxy Re-encryption without Pairings

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Cryptology and Network Security (CANS 2008)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 5339))

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Abstract

In a proxy re-encryption system, a semi-trusted proxy can convert a ciphertext originally intended for Alice into a ciphertext intended for Bob, without learning the underlying plaintext. Proxy re-encryption has found many practical applications, such as encrypted email forwarding, secure distributed file systems, and outsourced filtering of encrypted spam. In ACM CCS’07, Canetti and Hohenberger presented a proxy re-encryption scheme with chosen-ciphertext security, and left an important open problem to construct a chosen-ciphertext secure proxy re-encryption scheme without pairings. In this paper, we solve this open problem by proposing a new proxy re-encryption scheme without resort to bilinear pairings. Based on the computational Diffie-Hellman (CDH) problem, the chosen-ciphertext security of the proposed scheme is proved in the random oracle model.

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Author information

Authors and Affiliations

  1. School of Information Systems, Singapore Management University, Singapore, 178902

    Robert H. Deng & Jian Weng

  2. Department of Computer Science, **an University, Guangzhou, 510632, P.R. China

    Jian Weng

  3. Dept. of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China

    Shengli Liu & Kefei Chen

Authors
  1. Robert H. Deng
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  2. Jian Weng
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  3. Shengli Liu
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  4. Kefei Chen
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Editor information

Editors and Affiliations

  1. Department of Computer Science, University of California, Davis, USA

    Matthew K. Franklin

  2. Department of Computer Science, The University of Hong Kong, Pokfulam Road, Hong Kong, China

    Lucas Chi Kwong Hui

  3. Department of Computer Science, City University of Hong Kong, Hong Kong, Hong Kong

    Duncan S. Wong

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Deng, R.H., Weng, J., Liu, S., Chen, K. (2008). Chosen-Ciphertext Secure Proxy Re-encryption without Pairings. In: Franklin, M.K., Hui, L.C.K., Wong, D.S. (eds) Cryptology and Network Security. CANS 2008. Lecture Notes in Computer Science, vol 5339. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-89641-8_1

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  • DOI: https://doi.org/10.1007/978-3-540-89641-8_1

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-89640-1

  • Online ISBN: 978-3-540-89641-8

  • eBook Packages: Computer ScienceComputer Science (R0)

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