Policy-Based Signatures

  title={Policy-Based Signatures},
  author={Mihir Bellare and Georg Fuchsbauer},
  journal={IACR Cryptology ePrint Archive},
We introduce policy-based signatures (PBS), where a signer can only sign messages conforming to some authority-specified policy. The main requirements are unforgeability and privacy, the latter meaning that signatures not reveal the policy. PBS offers value along two fronts: (1) On the practical side, they allow a corporation to control what messages its employees can sign under the corporate key. (2) On the theoretical side, they unify existing work, capturing other forms of signatures as… CONTINUE READING
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