Delegating Capabilities in Predicate Encryption Systems

  title={Delegating Capabilities in Predicate Encryption Systems},
  author={Elaine Shi and Brent Waters},
  journal={IACR Cryptology ePrint Archive},
In predicate encryption systems, given a capability, one can evaluate one or more predicates on the encrypted data, while all other information about the plaintext remains hidden. We consider the first such systems to permit delegation of capabilities. In a system that supports delegation, a user Alice who has a capability can delegate to Bob a more restrictive capability, which allows him to learn less about encrypted data than she did. We formally define delegation in predicate encryption… CONTINUE READING
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