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Secure Hierarchical Identity Based Encryption Scheme in the Standard Model

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Book cover Progress in Cryptology - INDOCRYPT 2008 (INDOCRYPT 2008)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 5365))

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Abstract

An identity based cryptosystem is a public key cryptosystem where the public key can be represented as an arbitrary string. Hierarchical identity based cryptography is a generalization of identity based encryption that mirrors an organizational hierarchy. It allows a root private key generator to distribute the workload by delegating private key generation and identity authentication to lower-level private key generators. Most of hierarchical identity based encryption schemes are provably secure in the random oracles or weak models without random oracles such as selective-ID model.

Currently, there is no hierarchical identity based encryption scheme that is fully CCA2 secure in the standard model, with short public parameters and a tight reduction. In this paper, we first propose a hierarchical identity based encryption scheme that is fully secure in the standard model. And it achieves IND-ID-CCA2 security based on the decision q-TBDHE problem. The ciphertext size is independent of the level of the hierarchy. Moreover, our scheme has short public parameters, high efficiency and a tight reduction simultaneously.

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Authors and Affiliations

  1. Dept. of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Yanli Ren & Dawu Gu

Authors
  1. Yanli Ren
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  2. Dawu Gu
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Editor information

Editors and Affiliations

  1. Dept. of Computer Science and Engineering, Indian Institute of Technology, 721 302, Kharagpur, India

    Dipanwita Roy Chowdhury

  2. K.U. Leuven, ESAT/COSIC Kasteelpark, Arenberg 10, B-3001, Leuven-Heverlee, Belgium

    Vincent Rijmen

  3. Department of Computer Science and Engineering, Indian Institute of Technology, 721 302, Kharagpur, India

    Abhijit Das

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Ren, Y., Gu, D. (2008). Secure Hierarchical Identity Based Encryption Scheme in the Standard Model. In: Chowdhury, D.R., Rijmen, V., Das, A. (eds) Progress in Cryptology - INDOCRYPT 2008. INDOCRYPT 2008. Lecture Notes in Computer Science, vol 5365. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-89754-5_9

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  • DOI: https://doi.org/10.1007/978-3-540-89754-5_9

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-89753-8

  • Online ISBN: 978-3-540-89754-5

  • eBook Packages: Computer ScienceComputer Science (R0)

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