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公开(公告)号：US20230351035A1
公开(公告)日：2023-11-02
申请号：US17937995
申请日：2022-10-04
Inventor： Weiqi DAI , Liangliang YU , Hai JIN , Deqing ZOU
CPC classification number: G06F21/6218 , G06F21/602 , H04L9/0822 , H04L9/0825 , H04L9/0618 , H04L9/3221 , H04L9/3297
Abstract: The present invention relates to system and method for user-controllable sharing of authorization for private data, wherein the system at least comprises: a blockchain node, for recording and verifying transaction information and/or completing payment, a client, for encrypting a symmetric key into a re-encryption key to be sent to an IPFS node, so that after a re-encryption request it sends to the IPFS node is verified as valid, the client sends the symmetric key to a server; the IPFS node, for calling a zero-knowledge proof verification contract from the blockchain node in response to the re-encryption request from the client, and performing authorization and verification; a server, for sending first encrypted data involving user authorization to the IPFS node, and/or acquiring the symmetric key sent by the client and capable of decrypting authorization data. In the present invention, the control of authorized contents is transferred to the user from the service provider, enabling the user to control authorization. Besides, during authorization, authorization data contents, data flows and user behaviors are hidden, making use of the data protected from pry of service providers.
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Patent Agency Ranking
公开(公告)号：US20230085807A1
公开(公告)日：2023-03-23
申请号：US17664767
申请日：2022-05-24
Inventor： Weiqi DAI , Jinkai LIU , Hai JIN , Deqing ZOU
Abstract: 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.
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公开(公告)号：US20190281074A1
公开(公告)日：2019-09-12
申请号：US16109846
申请日：2018-08-23
Inventor： Hai JIN , Weiqi DAI , Yan XIA , Deqing ZOU
Abstract: 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.
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4.发明公开公开(公告)号：US20240220647A1
公开(公告)日：2024-07-04
申请号：US18356004
申请日：2023-07-20
Inventor： Weiqi DAI , Ziyi LIANG , Kexuan ZHAO , Deqing ZOU , Hai JIN
CPC classification number: G06F21/6218 , H04N5/76
Abstract: The present invention relates to a blockchain-based system and method for preventing unauthorized deletion of surveillance video, the system at least comprising: a plurality of camera components, for generating surveillance video; at least one video-recording node, for connecting to a blockchain network and randomly generating a key pair, splitting the video file received from the camera components into a plurality of video-file blocks and randomly sending them to participation nodes across the blockchain network for storage, and recording hash values of the stored video files and node information; and a blockchain network device, for updating the hash values of the video files uploaded by the video-recording nodes based on a smart contract. In the present invention, uploading and storing time for camera-videos is recorded by the smart contract as tamper-resistant time reference for law enforcement, protecting video data from malicious deletion at video-recording nodes without the need of redundant space.
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公开(公告)号：US20230299938A9
公开(公告)日：2023-09-21
申请号：US17661988
申请日：2022-05-04
Inventor： Weiqi DAI , Shuyue TUO , Hai JIN , Deqing ZOU
CPC classification number: H04L9/0637 , H04L9/50 , H04L63/0442 , H04L63/105
Abstract: 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.
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公开(公告)号：US20230087557A1
公开(公告)日：2023-03-23
申请号：US17661988
申请日：2022-05-04
Inventor： Weiqi DAI , Shuyue TUO , Hai JIN , Deqing ZOU
Abstract: 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.
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