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Conjunctive Broadcast and Attribute-Based Encryption

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Pairing-Based Cryptography – Pairing 2009 (Pairing 2009)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 5671))

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Abstract

Attribute-based encryption (ABE) system enables an access control mechanism over encrypted data by specifying access policies among private keys and ciphertexts. There are two flavors of ABE, namely key-policy and ciphertext-policy, depending on which of private keys or ciphertexts that access policies are associated with. In this paper we propose a new cryptosystem called Broadcast ABE for both flavors. Broadcast ABE can be used to construct ABE systems with direct revocation mechanism. Direct revocation has a useful property that revocation can be done without affecting any non-revoked users; in particular, it does not require users to update keys periodically. For key-policy variant, our systems appear to be the first fully-functional directly revocable schemes. For ciphertext-policy variant, our systems improve the efficiency from the previously best revocable schemes; in particular, one of our schemes admits ciphertext and private key sizes roughly the same as the currently best (non-revocable) ciphertext-policy ABE. Broadcast ABE can also be utilized to construct multi-authority ABE in the disjunctive setting.

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Authors and Affiliations

  1. Research Center for Information Security (RCIS), National Institute of Advanced Industrial Science and Technology (AIST), Akihabara-Daibiru Room 1003, 1-18-13, Sotokanda, Chiyoda-ku, Tokyo, 101-0021, Japan

    Nuttapong Attrapadung & Hideki Imai

Authors
  1. Nuttapong Attrapadung
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  2. Hideki Imai
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Editors and Affiliations

  1. Department of Computer Science and Engineering, University of California, San Diego, 9500 Gilman Drive, MC 0404, 92093-0404, La Jolla, CA, USA

    Hovav Shacham

  2. University of Texas at Austin Department of Computer Science, 1 University Station C0500 Taylor Hall 2.124, 78712-1188, Austin, TX, USA

    Brent Waters

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Attrapadung, N., Imai, H. (2009). Conjunctive Broadcast and Attribute-Based Encryption. In: Shacham, H., Waters, B. (eds) Pairing-Based Cryptography – Pairing 2009. Pairing 2009. Lecture Notes in Computer Science, vol 5671. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-03298-1_16

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  • DOI: https://doi.org/10.1007/978-3-642-03298-1_16

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-03297-4

  • Online ISBN: 978-3-642-03298-1

  • eBook Packages: Computer ScienceComputer Science (R0)

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