Mass data privacy protection system and method

The invention discloses a massive data privacy protection system and method, and belongs to the technical field of information security. According to the scheme, data encryption and decryption and identity authentication and authentication are carried out based on a PKI + CPK system, and local efficient authentication of mass data is realized by utilizing the characteristics of light weight, quick authentication, strong processing capacity, small computing resources, large scale and the like of CPK identification authentication. And the mandatory access control system is combined with a ciphertext access strategy library related to data operation attributes provided by PKI + CPK to realize on-demand access control of data such as reading, writing and execution with limited time domain, limited region and limited role. According to the scheme, mandatory access control and efficient authentication of PKI + CPK are combined, the method can be applied to scenes such as efficient privacy calculation and security a