Secure Certificateless Public Key Encryption without Redundancy.
Yinxia Sun, Futai Zhang · 2008
Abstract. Certificateless public key cryptography was introduced to solve the key escrow problem in identity based cryptography while enjoying the most attractive certificateless property. In this paper, we present the first secure certificateless public key encryption (CLPKE) scheme without redundancy. Our construction provides optimal bandwidth and quite efficient decryption process compared with the existing CLPKE schemes. It is provably secure against adaptive chosen ciphertext attacks in the random oracle model under a slightly stronger assumption.