Paper 2013/798

A Generic Chosen-Ciphertext Key-Leakage Secure Public Key Encryption Scheme from Hash Proof System

Rupeng Yang, Qiuliang Xu, Yongbin Zhou, Chengyu Hu, and Zuoxia Yu

Abstract

We present a new generic construction of public key encryption (PKE) scheme that is secure against a-posteriori chosen-ciphertext λ-key-leakage attacks (LR-CCA-2 secure) from any universal hash proof system (HPS). Our construction relies only on the existence of universal hash proof systems, which makes our scheme simple, clean and efficient. Furthermore, our construction is a potential way to construct LR-CCA-2 secure PKE scheme from minimal assumption.