Secure multi-party computing method, device, system and equipment and storage medium

• Main Authors: HAO QINGLI, YU ZHUO, HE DONG, SHEN LIANG, ZHANG CHENGXIN, YU HAN, XUAN DONGHAI, MEN JINBAO
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The embodiment of the invention provides a secure multi-party computing method, device, system and equipment, and a storage medium, and the method comprises the steps: a target aggregator carries out the blind processing of each piece of obtained ciphertext data based on a random blind value and a public key of each user side, obtains a plurality of pieces of initial blind data, sends each piece of initial blind data to a computing server, and carries out the blind processing of each piece of initial blind data; the public key of the user side is obtained by the user side through calculation based on a public parameter group generated by the calculation server, the calculation server carries out ciphertext conversion on the initial blind data based on the master key and the aggregation public key to obtain multiple pieces of encrypted blind data, the target aggregator carries out blind value removal processing on the encrypted blind data to obtain multiple pieces of encrypted data, and the multiple pieces of