Paper 2005/249

Efficient Certificateless Public Key Encryption

Yijuan Shi and Jianhua Li

Abstract

Certificateless public key cryptography was introduced to overcome the key escrow limitation of the identity-based cryptography. Most of the existing certificateless public key encryption schemes are based on Boneh and Franklin's identity-based encryption scheme (BF-IBE). In this paper, we construct a new certificateless public key encryption scheme from the efficient SK-IBE which has been proved to be IND-ID-CCA secure. The new scheme is more efficient on computation complexity or published public key information than the existing schemes.