International Association
for Cryptologic Research

In this paper we investigate the security for integrated public-key encryption (PKE)

and public-key encryption with keyword search (PEKS) schemes. We observe that the security

notions for integrated PKE and PEKS schemes considered in the existing literature are not strong

enough to capture practical attacks, thus define a new notion named joint CCA-security which is

shown to be stronger than the previous ones. We also propose two simple and efficient constructions

of jointly CCA-secure integrated PKE and PEKS schemes from anonymous (hierarchical) identity-

based encryption schemes. Besides, we review the consistency for PEKS schemes and improve

previous results.