
Security
SecurityGeneralized (Identity-Based) Hash Proof System and its Applications
In this paper, the authors generalize the paradigm of Hash Proof System (HPS) proposed by Cramer and Shoup. In the central of their generalization, they lift subset membership problem to distribution distinguish problem. Their generalized HPS clarifies and encompass all the known Public-Key Encryption (PKE) schemes that essentially implement the idea of hash proof system. ...