Cryptology ePrint Archive: Report 2013/413

Policy-Based Signatures

Mihir Bellare and Georg Fuchsbauer

Abstract: We introduce signatures where signers can only sign messages that conform to some policy, yet privacy of the policy is maintained. We provide definitions and show that policy-based signatures provide a framework which yields a unified view of many other existing types of signatures that now appear as special cases. We also show how still other primitives are easily realized using policy-based signatures as a building block. We provide generic constructions of policy-based signatures and then show how to achieve them efficiently.

Category / Keywords: public-key cryptography / Signatures, policies, group signatures, NIZKs, Groth-Sahai proofs

Date: received 22 Jun 2013, last revised 22 Jun 2013

Contact author: georg fuchsbauer at ist ac at

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Version: 20130625:160306 (All versions of this report)

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