Covercrypt: an Efficient Early-Abort KEM for Hidden Access Policies with Traceability from the DDH and LWE

ePrint Report: Covercrypt: an Efficient Early-Abort KEM for Hidden Access Policies with Traceability from the DDH and LWE

Théophile Brézot, Paola de Perthuis, David Pointcheval

Attribute-Based Encryption (ABE) is a very attractive primitive to limit access according to specific rights. While very powerful instantiations have been offered, under various computational assumptions, they rely on either classical or post-quantum problems, and are quite intricate to implement, generally resulting in poor efficiency; the construction we offer results in a powerful efficiency gap …

access attribute-based encryption encryption eprint report hidden limit policies report rights traceability