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Paper 2020/1299

Unbounded Key-Policy Attribute-based Encryption with Black-Box Traceability

Yunxiu Ye and Zhenfu Cao and Jiachen Shen

Abstract

Attribute-based encryption received widespread attention as soon as it was proposed. However, due to its specific characteristics, some restrictions on attribute set in attribute-based encryption are not flexible enough in actual operation. In addition, since access authorities are determined according to users' attributes, users sharing the same attributes are difficult to be distinguished. Once a malicious user makes illicit gains by their decryption authorities, it is difficult to track down specific users. This paper follows practical demands to propose a more flexible key-policy attribute-based encryption scheme with black-box traceability. The scheme has a constant size of public parameters which can be utilized to construct attribute-related parameters flexibly, and the method of traitor tracing in broadcast encryption is introduced to achieve effective malicious user tracing. In addition, the security and feasibility can be proved by the security proofs and performance evaluation in this paper.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. Minor revision. IEEE TrustCom/IWCSS 2020
Keywords
Attribute-based encryptionKey-policyTraceabilityUnbounded
Contact author(s)
51184501072 @ stu ecnu edu cn
History
2021-04-02: withdrawn
2020-10-19: received
See all versions
Short URL
https://ia.cr/2020/1299
License
Creative Commons Attribution
CC BY
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