公开(公告)号：US20230085807A1

公开(公告)日：2023-03-23

申请号：US17664767

申请日：2022-05-24

申请人： Huazhong University of Science and Technology

发明人： Weiqi DAI ,  Jinkai LIU ,  Hai JIN ,  Deqing ZOU

IPC分类号： H04L9/00 ,  H04L9/32 ,  H04L9/08

摘要： The present invention provides an anti-trapdoor-leakage on-chain data restoration system, at least comprising: a blockchain node, for broadcasting transaction data of a request-initiating person to blockchain nodes and proposer nodes in other groups, respectively; and a proposer node, for performing computation of a Chameleon-Hash function using a key set that is generated by a key-generating module provided in the proposer node, packaging the transaction data to generate a new block, and distributing the new block to all the blockchain nodes so that the blockchain nodes update their respective underlying ledgers according to the new blocks broadcasted by the proposer. The system of the present invention not only realizes such functions as restoration and editing of the transaction data, but also protects operational security and reliability of blockchains.

公开(公告)号：US20190281074A1

公开(公告)日：2019-09-12

申请号：US16109846

申请日：2018-08-23

申请人： HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Hai JIN ,  Weiqi DAI ,  Yan XIA ,  Deqing ZOU

IPC分类号： H04L29/06 ,  G06F21/56 ,  G06F21/62

摘要： The present invention involves with a cloud tenant oriented method and system for protecting privacy data. The method comprises at least the following steps: analyzing event handler information and/or behavioral signature information of request information and determining an execution mode, selecting at least one node without a behavioral signature plot to execute the tenant request and recording an execution result, generating a behavioral signature plot based on the execution result, and dynamically detecting security-sensitive behavior based on the behavioral signature plot. The present invention ensures data security during processing of security-sensitive data for cloud services by adopting a technology based on behavioral signatures, and prevents attackers from exploiting vulnerabilities and bypassing security control to conduct malicious operations. When there is no corresponding behavioral signature plots, multiples nodes are selected for processing of event handlers, and private data are dynamically protected based on behavioral signature plots, so as to assure secure execution results, provide fine-grained protection for security-sensitive behavior and protect data security while maintaining relatively low performance costs.

公开(公告)号：US20230087557A1

公开(公告)日：2023-03-23

申请号：US17661988

申请日：2022-05-04

申请人： Huazhong University of Science and Technology

发明人： Weiqi DAI ,  Shuyue TUO ,  Hai JIN ,  Deqing ZOU

IPC分类号： H04L9/06 ,  H04L9/00 ,  H04L9/40

摘要： 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.

公开(公告)号：US20190207763A1

公开(公告)日：2019-07-04

申请号：US16169377

申请日：2018-10-24

申请人： Huazhong University of Science and Technology

发明人： Hai JIN ,  Peng XU ,  Shuanghong HE ,  Deqing ZOU

IPC分类号： H04L9/30 ,  H04L9/06 ,  G06F17/30 ,  G06F7/58

摘要： The present invention involves with a method of searchable public-key encryption, a system and server using the method.