Towards Public Key Encryption Scheme Supporting Equality Test with Fine-Grained Authorization

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Tang, Qiang (2011) Towards Public Key Encryption Scheme Supporting Equality Test with Fine-Grained Authorization. In: Proceedings of the 16th Australian conference on information security and privacy, 11-13 Jul 2011, Melbourne, Australia.

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Abstract:In this paper we investigate a new category of public key encryption schemes which supports equality test between ciphertexts. With this new primitive, two users, who possess their own public/private key pairs, can issue token(s) to a proxy to authorize it to perform equality test between their ciphertexts. We provide a formulation and a corresponding construction for this primitive, and our formulation provides fine-grained authorization policy enforcements for users. With the increasing popularity of outsourcing data and computations to third-party service providers, this new primitive will be an important building block in designing privacy protection solutions supporting operations on encrypted data.
Item Type:Conference or Workshop Item
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Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/76721
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