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Efficient Ciphertext Policy Attribute-Based Encryption with Constant-Size Ciphertext and Constant Computation-Cost

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Book cover Provable Security (ProvSec 2011)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 6980))

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Abstract

Attribute-based encryption provides good solutions to the problem of anonymous access control by specifying access policies among private keys or ciphertexts over encrypted data. In ciphertext-policy attribute-based encryption (CP-ABE), each user is associated with a set of attributes, and data is encrypted with access structures on attributes. A user is able to decrypt a ciphertext if and only if his attributes satisfy the ciphertext access structure. CP-ABE is very appealing since the ciphertext and data access policies are integrated together in a natural and effective way.

Most current CP-ABE schemes incur large ciphertext size and computation costs in the encryption and decryption operations which depend at least linearly on the number of attributes involved in the access policy. In this paper, we present two new CP-ABE schemes, which have both constant-size ciphertext and constant computation costs for a non-monotone AND gate access policy, under chosen plaintext and chosen ciphertext attacks. The security of first scheme can be proven CPA-secure in standard model under the decision n-BDHE assumption. And the security of second scheme can be proven CCA-secure in standard model under the decision n-BDHE assumption and the existence of collision-resistant hash functions. Our scheme can also be extended to the decentralizing multi-authority setting.

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Author information

Authors and Affiliations

  1. State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China

    Cheng Chen, Zhenfeng Zhang & Dengguo Feng

Authors
  1. Cheng Chen
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  2. Zhenfeng Zhang
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  3. Dengguo Feng
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Editor information

Editors and Affiliations

  1. Palo Alto Research Center, 94304, Palo Alto, CA, USA

    Xavier Boyen

  2. School of Telecommunications Engineering, Xidian University, 710071, Xi’an, China

    Xiaofeng Chen

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Chen, C., Zhang, Z., Feng, D. (2011). Efficient Ciphertext Policy Attribute-Based Encryption with Constant-Size Ciphertext and Constant Computation-Cost. In: Boyen, X., Chen, X. (eds) Provable Security. ProvSec 2011. Lecture Notes in Computer Science, vol 6980. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24316-5_8

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  • DOI: https://doi.org/10.1007/978-3-642-24316-5_8

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-24315-8

  • Online ISBN: 978-3-642-24316-5

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