Data protection and privacy encryption technology face heavy challenges in the billing big data environment. In this paper, after combing the current problems of privacy protection and data encryption, RSA homomorphic encryption algorithm is combined with CP-ABE attribute encryption protection algorithm to construct RSA+CP-ABE hybrid encryption mechanism. In order to explore the optimization effect of RSA+CP-ABE hybrid encryption algorithm, the security and performance of hybrid encryption algorithm in this paper are analyzed. The hybrid encryption algorithm of RSA+CP-ABE in this paper improves the security while maintaining the diffusivity and obfuscation.The encryption time of RSA+CP-ABE algorithm is comparable to that of the original RSA algorithm, while the decryption time is significantly reduced.The RSA+CP-ABE algorithm improves the key security and decryption speed.The encryption efficiency of the RSA+CP-ABE scheme is comparable to that of the RSA scheme. The encryption efficiency of RSA+CP-ABE scheme is reduced compared with that of RSA scheme, but the degree of efficiency improvement is reasonable and can meet the practical applications.
