SYSTEM FOR PRIVACY PROTECTION DURING IOT SECURE DATA SHARING AND METHOD THEREOF

The present invention provides a system for privacy protection during IoT secure data sharing and a method thereof. The present invention relates to IoT data sharing, wherein it allows users to securely share data encrypted through decentralized attribute-based encryption on a blockchain-based platform without disclosing their attribute permission, so that individual users will not be identified according to their attributes, thereby protecting user privacy. The present invention also enables users sharing encrypted data and achieving traceability and accountability in the event of privacy breach. The present invention further provides an approach to verifying user permission using an attribute-based zero-knowledge proof, so as to securely and reliably verify whether permission of a data user is real. The present invention is suitable for solving existing problems about secure sharing and privacy protection of IoT data by verifying user identity and securely sharing user privacy data on a zero-knowledge basis.