关键词: 标准模型, 适应性选择密文安全, 密文公开可验证性, 混合加密

Abstract: It is an important research topic in public key cryptography to design efficient public key encryption schemes which secure against adaptive chosen-ciphertext attacks in the standard model. Based on judging pairing Diffie-Hellman problem, it presents an efficient strong safety and shorter public/secret keys hybrid encryption scheme, which is an encryption scheme based on symmetric encryption algorithm, message authentication code algorithm and key division algorithm. Efficiency of the scheme has been analyzed, and its security has been proved. Analysis shows that the scheme has IND-CCA2 security in the standard model, supports public ciphertext integrity verification, and is more efficient than other schemes.

Key words: standard model, adaptive chosen-ciphertext security, public ciphertext verifiability, hybrid encryption