International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 25 June 2013

Mihir Bellare, Georg Fuchsbauer
ePrint Report ePrint Report
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.

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