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

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
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Distributed and Embedded Systems (DIES)
Link to this item:	http://purl.utwente.nl/publications/76721
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