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Identity-Based Proxy Re-encryption Without Random Oracles

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Information Security (ISC 2007)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 4779))

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Abstract

A proxy re-encryption scheme allows Alice to temporarily delegate the decryption rights to Bob via a proxy. Alice gives the proxy a re-encryption key so that the proxy can convert a ciphertext for Alice into the ciphertext for Bob. In this paper, we propose two identity-based proxy re-encryption schemes, which are both proved secure in the standard model. The first one is efficient in both computation and ciphertext length, and the other one achieves chosen-ciphertext security. Our solutions answer the open problems left in the previous work.

Research supported in part by Taiwan Information Security Center at NCTU (TWISC@NCTU), and National Science Council project NSC 95-2221-E-009-030.

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Author information

Authors and Affiliations

  1. Department of Computer Science, National Chiao Tung University, Hsinchu, 300, Taiwan

    Cheng-Kang Chu & Wen-Guey Tzeng

Authors
  1. Cheng-Kang Chu
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  2. Wen-Guey Tzeng
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Editor information

Juan A. Garay Arjen K. Lenstra Masahiro Mambo René Peralta

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© 2007 Springer-Verlag Berlin Heidelberg

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Chu, CK., Tzeng, WG. (2007). Identity-Based Proxy Re-encryption Without Random Oracles. In: Garay, J.A., Lenstra, A.K., Mambo, M., Peralta, R. (eds) Information Security. ISC 2007. Lecture Notes in Computer Science, vol 4779. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-75496-1_13

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  • DOI: https://doi.org/10.1007/978-3-540-75496-1_13

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-75495-4

  • Online ISBN: 978-3-540-75496-1

  • eBook Packages: Computer ScienceComputer Science (R0)

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