Tencent Technology (shenzhen) Company Limited

Shenzhen Jimuyida Technology Co. Ltd

Zte Corporation

Tencent Technology Company Limited

Yong Ding

Li Kong

Maocai Li

Zongyou Wang

Yifang Shi

Kaiban Zhou

Changqing Yang

Haitao Tu

Rui Guo

Nan Wang

Wei Luo

Hu Lan

Jinsong Zhang

Gengliang Zhu

Qucheng Liu

Qiuping Chen

Peng Wang

Xin Wang

Yuan Wang

Kai Zhou

Mao Cai Li

Zong You Wang

Jianyong Chen

Hai Tao Tu

Yi Fang Shi

Chang Qing Yang

Zhiwei Peng

Yunqiang Li

An online matching and optimization method combining geometry and texture and a three-dimensional (3D) scanning system are provided. The method includes obtaining pairs of depth texture images with a one-to-one corresponding relationship, and collecting the pairs of the depth texture images including depth images by a depth sensor and collecting texture images by a camera device; adopting a strategy of coarse to fine to perform feature, matching on the depth texture images corresponding to a current frame and on the depth texture images corresponding to the target frames, to estimate a preliminary pose of the depth sensor in the 3D scanning system; combining a geometric constraint and a texture constraint to optimize the estimated preliminary pose, and obtaining a refined motion estimation between the frames.

Online matching and optimization method combining geometry and texture, 3D scanning device, system and non-transitory storage medium

Smart grip

A method for electing a representative node device performed by a first node device in a blockchain system includes: broadcasting candidate addition transaction data in the blockchain system, the candidate addition transaction data carrying credential data, the credential data being received from a target server and indicating that a first node device meets a qualification requirement for a candidate node device; storing the candidate addition transaction data on a target blockchain of a blockchain system when a plurality of node devices in the blockchain system verify the candidate addition transaction data by consensus; and participating in an election of the representative node device according to the candidate addition transaction data stored on the target blockchain.

Method and apparatus for electing representative node device, computer device, and storage medium

Aspects of the disclosure are directed to a method for use on a blockchain network that includes an accounting node subnetwork having accounting nodes configured to record a data block onto a blockchain and a service node having service nodes configured to verify data blocks recorded by the accounting nodes onto the blockchain. The method can include generating a signature based on transaction information to be included in a data block to be added onto the blockchain by using a key specific to the accounting node. The method can further include adding the transaction information and the generated signature to the data block and adding the data block onto the blockchain, and transmitting the signature to the service nodes in the service node subnetwork, so that the service nodes perform signature verification on the signature based on the key specific to the accounting node.

Separation of accounting node subnetwork and service node subnetwork

Embodiments of this disclosure disclose a resource transfer data management method and apparatus, and a storage medium, which belong to the field of Internet technologies. The method includes: receiving transaction data transmitted by a first server, wherein the transaction data is obtained by the first server by signing resource transfer data according to a private key of the first server; verifying the transaction data according to a public key of the first server; and generating a second block according to the transaction data and a feature value of a first block in a blockchain when the verification succeeds, and adding the second block as a next block of the first block to the blockchain.

Resource transfer data management method and apparatus, and storage medium

Scanner

A method for electing a representative node device for a blockchain system includes: receiving IP address information of a first node device, the first node device being in a candidate state for a representative node device; receiving, from the first node device, an IP address obtaining request for requesting IP address information of a representative node device; when the first node device is determined to be a representative node device of the blockchain system elected in a current election process, transmitting, to the first node device, an IP address list comprising IP address information of representative node devices elected in the current election process; and when the first node device is determined not to be a representative node device of the blockchain system elected in the current election process, skipping the IP address obtaining request.

Method for recording data block in blockchain network, accounting node, and medium

This application provide a data management method for a blockchain system, a medium, and an electronic device. The system includes an accounting node sub-network and a service node sub-network. The method includes: adding, after an accounting node generates a first data block, first key information used for verifying a block header of a second data block generated after the first data block to a block header of the first data block; generating a signature corresponding to the first data block, and adding the signature corresponding to the first data block to the block header of the first data block; and releasing the block header of the first data block to the service node sub-network, to cause a service node to verify the signature included in the block header of the first data block, and obtaining the first key information after a successful verification to verify the block header of the second data block.

Data management method and apparatus for blockchain system, medium, and electronic device

A method for electing a representative node device is performed at a blockchain system, including: obtaining voting transaction data from the node devices, the voting transaction data being used for voting for one or more node devices of the blockchain system as representative node devices; generating and storing the voting transaction data into a target blockchain of the blockchain system when a plurality of node devices of the blockchain system verify the voting transaction data by consensus; and when a quantity of blocks in the target blockchain generated using the voting transaction data reaches a preset quantity, determining an election result according to quantities of votes of the node devices determined from the voting transaction data, the election result identifying a plurality of representative node devices in the blockchain system being configured to generate new blocks for the target blockchain and perform verification on the new blocks by consensus.

A data backup method includes querying a first block of a first blockchain for unused transaction output information based on a first condition being met, the first block including each block of all blocks included in the first blockchain; generating transaction information according to the unused transaction output information obtained based on the querying, the transaction information indicating a transaction operation based on an account address to which the unused transaction output information belongs; recording the transaction information in a second block and releasing the second block, and recording the second block on which a consensus is reached on a second blockchain; and backing up the first blockchain into a storage system, and deleting the first blockchain. Counterpart apparatus, terminal, server, and/or non-transitory computer-readable medium are also contemplated.

Data backup method, storage medium, and computing device

The present invention discloses a digital signature scheme based on braid group conjugacy problem and a verifying method thereof, wherein a signatory S selects three braids x&#x3b5;LB(l), x'&#x3b5;B(l), a&#x3b5;B(l), and considers braid pair (x&#x2032;,x) as a public key of S, braid a as a private key of S; Signatory S uses hash function h for a message M needing signature to get y=h(M)&#x3b5;B(l); generating a braid b&#x3b5;RB(l) randomly, then signing M with a and b to obtain Sign(M)=abyba; a signature verifying party V obtains the public key of S, calculating the message M by employing hash function h, obtaining the y=h(M); judging whether sign(M) and y, sign(M)x&#x2032; and xy are conjugate or not, if yes, sign(M) is a legal signature of message M; the present invention reduces the number of braids involved and the number for conjugacy decision without reducing security, thereby improving the operation efficiency of signature.

Digital signature method based on braid groups conjugacy and verify method thereof

Growing community of inventors

Shenzhen, China

Yong Ding