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2009
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Privacy-Aware Attribute-Based Encryption with User Accountability

8 years 11 months ago
Privacy-Aware Attribute-Based Encryption with User Accountability
As a new public key primitive, attribute-based encryption (ABE) is envisioned to be a promising tool for implementing fine-grained access control. To further address the concern of user access privacy, privacy-aware ABE schemes are being developed to achieve hidden access policy recently. For the purpose of secure access control, there is, however, still one critical functionality missing in the existing ABE schemes, which is user accountability. Currently, no ABE scheme can completely prevent the problem of illegal key sharing among users. In this paper, we tackle this problem by firstly proposing the notion of accountable, anonymous, and ciphertext-policy ABE (CP-A3 BE, in short) and then giving out a concrete construction. We start by improving the state-of-the-art of anonymous CP-ABE to obtain shorter public parameters and ciphertext length. In the proposed CP-A3 BE construction, user accountability can be achieved in black-box model by embedding additional user-specific informa...
Jin Li, Kui Ren, Bo Zhu, Zhiguo Wan
Added 27 May 2010
Updated 27 May 2010
Type Conference
Year 2009
Where ISW
Authors Jin Li, Kui Ren, Bo Zhu, Zhiguo Wan
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