Towards attribute revocation in key-policy attribute based encryption

Authors:
Pengpian Wang;Dengguo Feng;Liwu Zhang
Affiliations:
State Key Laboratory of Information Security, Institute of Software, The Chinese Academy of Sciences, Beijing, China;State Key Laboratory of Information Security, Institute of Software, The Chinese Academy of Sciences, Beijing, China;State Key Laboratory of Information Security, Institute of Software, The Chinese Academy of Sciences, Beijing, China
Venue:
CANS'11 Proceedings of the 10th international conference on Cryptology and Network Security
Year:
2011

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Abstract

Attribute revocation is important to the attribute-based encryption (ABE). The existing ABE schemes supporting revocation mainly focus on the revocation of the user's identity, which could only revoke the user's whole attributes by revoking the user's identity. In some cases, we wish to revoke one attribute of a user instead of the whole attributes issued to him without affecting any other user's private key, such that the user still can use his private key to decrypt as long as the unrevoked attributes of him satisfy the decryption condition. In this paper, we propose two KP-ABE schemes realizing the attribute revocation under the direct revocation model.