-
Patent Agency Ranking
公开(公告)号：US20220255739A1
公开(公告)日：2022-08-11
申请号：US17444224
申请日：2021-08-02
Inventor： Peng XU , Tianyang CHEN , Yubo ZHENG , Hai JIN , Wei WANG
Abstract: The present invention relates a method for ensuring search completeness of searchable public key encryption, applicable to a blockchain network formed by a plurality of computer nodes. The method at least comprises: the blockchain network receiving a keyword ciphertext and a corresponding file-identifier ciphertext generated by a transmitting end based on the public key encryption, and at least one miner storing the ciphertexts in a ciphertext table; the blockchain network receiving a search trapdoor Tw transmitted by a receiving end, generated according to a private key and a keyword w to be searched; the at least one miner in the blockchain network performing a secure search based on information of a state table and the search trapdoor Tw, and outputting a search result to the blockchain network; and the blockchain network feeding the search result back to the receiving end. The invention uses the blockchain technology to solve the long-standing search completeness problem in searchable public key encryption, and the proposed method has universality.
-
公开(公告)号：US20220255744A1
公开(公告)日：2022-08-11
申请号：US17444613
申请日：2021-08-06
Inventor： Peng XU , Yubo ZHENG , Tianyang CHEN , Hai JIN , Wei WANG
IPC: H04L9/30 , H04L9/06 , G06F16/903
Abstract: The present invention relates to a method of time-delay encryption with keyword search and system using the same, at least comprising: based on a public key PK, generating searchable ciphertexts Cw and/or file ciphertexts for keywords w of at least one to-be-uploaded file by means of time-delay encryption and uploading the ciphertexts to a cloud server; sending at least one keyword search trapdoor Tw generated for one said to-be-searched keyword w based on a private key SK to the cloud server; and the cloud server, based on the keyword search trapdoor Tw performing keyword search on all the searchable ciphertexts Cw so as to obtain the corresponding searchable ciphertexts Cw, and determining the corresponding file ciphertexts based on the searched searchable ciphertexts Cw and feeding the corresponding file ciphertexts to a receiving end. The present invention increases the difficulty for attackers to launch keyword guessing attacks.
-
公开(公告)号：US20240330506A1
公开(公告)日：2024-10-03
申请号：US18603202
申请日：2024-03-12
CPC classification number: G06F21/6245 , H04L9/088 , H04L9/3247
Abstract: A method and system for deleting multi-copy personal data efficiently and securely is provided, wherein the personal data and its subject identifier are signed and uploaded to data domains and stored as personal data copies; the personal data copies along with its source and destination data are circulated among the data domains; the data domain receiving a deletion instruction transmits the deletion instruction to every relevant data domains based on the identifier of the personal data subject and the destination data and then performs deletion; and after completing the deletion, the data domain deposit its domain identifier and feedback data it receives into a log, and feed the log back to its superior data domain. And the system of the present disclosure includes a plurality of data domains that can perform the above operations, thereby realizing association-based storage, association-based deletion and verification of association-based deletion of multi-copy personal data.
-
公开(公告)号：US20240330505A1
公开(公告)日：2024-10-03
申请号：US18602957
申请日：2024-03-12
Inventor： Peng XU , Yixin SU , Wei WANG , Mengyang YU , Tianyang CHEN , Hai JIN
IPC: G06F21/62
CPC classification number: G06F21/6245 , G06F2221/2143
Abstract: A method and system for trusted third-party audit of personal-information deletion is provided, wherein the method includes: acquiring log data of an arbitrary source-domain personal-information deleting body in a network and of its associated-domain personal-information deleting bodies; normalizing the log data according to predetermined parsing rules and thereby generating normalized log data; and performing consistency-of-notification analysis and operation-compliance analysis on the normalized log data by means of association analysis. The present application is based on an audit analysis of log files to identify whether the information deletion process conforms to the multi-dimensional or multi-level audit judgment conditions and to perform forensics on abnormal deletion of personal information in a timely manner, so as to ensure that personal-information deletion can satisfy requirements of internal control, industrial standards, policies and regulations.
-
公开(公告)号：US20220103340A1
公开(公告)日：2022-03-31
申请号：US17172145
申请日：2021-02-10
Inventor： Peng XU , Tianyang CHEN , Yubo ZHENG , Hai JIN , Wei WANG
IPC: H04L9/06 , G06F16/2455 , H04L9/08
Abstract: The present invention relates to a method and a system for robust, searchable, symmetrical encryption, the method comprising: during initialization, having a retrieval server perform retrieval on stored ciphertext information according to a searchable ciphertext and retrieval trapdoor information (Cntupd, K, Locgrp) sent by a client, wherein, the retrieval server acquires a last received first ciphertext set Cnew from a ciphertext database CDB just before the present retrieval according to a retrieval key K and an encryption counter Cntupd sent by the client, acquiring a second ciphertext set Ccache in a retrieval request history from a cache ciphertext database GRP according to a cache ciphertext index Locgrp, and merging the first ciphertext set Cnew and the second ciphertext set Ccache to form a retrieval set , and sending it to the client for decryption. The present invention is able to improve retrieval performance of searchable symmetrical encryption algorithm with robust forward and backward secrecy and to make searchable symmetrical encryption algorithm more practical.
-
-
-
-
Search Results
5
records
(took 0.016 seconds)
