Traceable Policy-Based Signatures with Delegation

ePrint Report: Traceable Policy-Based Signatures with Delegation

Ismail Afia, Riham AlTawy

In PKC 2014, a policy-based signature (PBS) scheme was proposed by Bellare and Fuchsbauer in which a signer can only sign messages conforming to some policy specified by an issuing authority. PBS construction supports the delegation of signing policy keys with possible restrictions to the original policy. Although the PBS scheme is meant to restrict the signing privileges of the scheme’s users, singers could easily share their signing keys …

authority construction eprint report keys messages pbs pkc policy privileges report restrictions sign signature signatures signing traceable