Abstract
Ciphertext-policy attribute-based encryption (CP-ABE) is a well-known cryptographic technology for guaranteeing data confidentiality but also fine-grained data access control. It enables data owners to define flexible access policy for cloud-based data sharing. However, the user revocation and attribute update problems existing in CP-ABE systems that are long-standing unsolved in the literature. In this paper, we propose the first access control (CP-ABE) scheme supporting user revocability and attribute update. Specifically, the user revocation is defined in the identity-based setting that does not conflict our attribute-based design. The cost brought by attribute update is efficient in the sense that we only concentrate on the update of the ciphertexts associated with the corresponding updated attribute. Moreover, the security analysis shows that the proposed scheme is secure under the decisional Bilinear Diffie-Hellman assumption.
Original language | English |
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Title of host publication | Information Security and Privacy - 21st Australasian Conference, ACISP 2016, Proceedings |
Publisher | Springer Verlag |
Pages | 525-540 |
Number of pages | 16 |
Volume | 9722 |
ISBN (Print) | 9783319402529 |
DOIs | |
Publication status | Published - 2016 |
MoE publication type | A4 Article in a conference publication |
Event | Australasian Conference on Information Security and Privacy - Melbourne, Australia Duration: 4 Jul 2016 → 6 Jul 2016 Conference number: 21 |
Publication series
Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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Volume | 9722 |
ISSN (Print) | 03029743 |
ISSN (Electronic) | 16113349 |
Conference
Conference | Australasian Conference on Information Security and Privacy |
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Abbreviated title | ACISP |
Country/Territory | Australia |
City | Melbourne |
Period | 04/07/2016 → 06/07/2016 |
Keywords
- Access control
- Attribute update
- Attribute-based encryption
- Cloud
- User revocability