Updatable Policy-Compliant Signatures

ePrint Report: Updatable Policy-Compliant Signatures

Christian Badertscher, Monosij Maitra, Christian Matt, Hendrik Waldner

Policy-compliant signatures (PCS) are a recently introduced primitive by Badertscher et
al. [TCC 2021] in which a central authority distributes secret and public keys associated with sets of attributes (e.g., nationality, affiliation with a specific department, or age) to its users. The authority also enforces a policy determining which senders can sign messages for which receivers based on a joint check of their attributes. For example, senders …

age attributes authority christian department eprint report keys matt pcs policy public public keys report secret signatures tcc