User privacy protection method based on secure smart contract k-anonymity incentive mechanism

• Main Authors: XIAO KE, LI CHEN, GENG ZIYE, HE YUNHUA
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2017
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention relates to a user privacy protection method based on a secure smart contract k-anonymity incentive mechanism. According to the method, contracts are divided into public contracts and private contracts, the private contracts can be seen only by users in an anonymous group, the public contracts are encrypted through group keys to be prevented from being viewed by outsiders, and the private contracts and the public contracts are jointly verified, such that the security when the users request service is effectively guaranteed. According to the invention, the users can be encouraged to join the k-anonymous group and apply decentralized smart contracts such that potential security risks in a trusted center can be avoided; a part of information of the public contracts is encrypted by use of the group keys so that transaction relations are hidden; and joint verification is carried out by use of the private contracts and the public contracts and group verification is performed by use of a blind group sig