Social network security outsourcing-oriented data privacy encryption protection method and system, and storage medium

The invention provides a data privacy encryption protection method and system for social network security outsourcing and a storage medium. The system comprises a key forwarding and data processing device, a key generation device, a task encryption device and a result decryption device. According to the method, through a multi-prime CRT accelerated Paillier homomorphic encryption security outsourcing calculation scheme, data can be effectively encrypted and outsourced to a cloud computing center with high computing power for computational analysis; the problems that a local intrusion detection server cannot cope with calculation of a large amount of data due to low calculation performance and an existing outsourcing encryption scheme is low in efficiency are solved. Compared with an original Paillier encryption algorithm and an outsourcing calculation scheme based on other encryption algorithms, the protocol has higher security and encryption and decryption efficiency, especially when the prime number is 4, c