65results about How to "Non-tamperable" patented technology

The embodiment of the invention provides a storage method and a clearing system, which are used for solving the technical problem of low information security when the clearing system is used. The storage method comprises the following steps that input information is obtained, wherein the input information comprises money borrowing information input by a money borrower through a first terminal connected with a server and investment information input by an investor through a second terminal connected with the server; a contract list is generated on the basis of the input information, wherein the contract list comprises at least one clearing item, and the clearing item is used for indicating the trading rule between the money borrower and the investor; the contract list is sent to a distributed account book connected with the clearing system, wherein the distributed account book is used for storing the contract list, and the contact list is in a tampering forbidding state in the distributed account book.

The invention relates to the field of real estates, and discloses a block chain-based house history generation method. The method comprises the following steps of: firstly filling information, carrying out operation by a block chain, generating first block data of a house, verifying validity of the first block data, and storing the first block data in the whole block chain; when the house state changes, for example, data updating or owner alternation is carried out, obtaining data of the last block from the whole block chain, filling modification content or alternation content, carrying out operation by the block chain, generating the current block data, verifying effectiveness of a signature of the current block data and integrity of the modification content or the alternation content, and storing the current block data in the whole block chain. According to the method, uniform house history is formed, and the disclosed information cannot be tampered, so that the correctness and tamper-resistance of the house information are ensured.

The invention belongs to the technical field of quantum block chains. The invention discloses a quantum block chain network anonymous election method and system based on trust evaluation. The method comprises the following steps: identity trust evaluation of voters among miner nodes is completed by using a quantum secure direct communication technology, then voters calculate commitment values of voter election contents by using a quantum bit commitment protocol, and broadcast the commitment values to all miner nodes in a block chain; and then the miner nodes are combined with a quantum honestyByzantine protocol to complete voting statistics. The security model analysis of the protocol proves that the protocol has the advantages of anonymity, tamper resistance, verifiability and the like;according to the invention, the honesty quantum Byzantine protocol is adopted, so that the blockchain system can achieve a consistency protocol, and the protocol efficiency is better.

The embodiment of the invention provides a commodity tracing method and device based on a block chain, equipment and a storage medium, and relates to the technical field of block chains. The method comprises the following steps: obtaining a unique identifier of a target commodity, and storing the unique identifier as a traceability code of the target commodity on a block chain; based on the uniqueidentifier, inquiring storage information of a target commodity corresponding to each participation node in the circulation process of the target commodity from a block chain; and determining circulation information of the target commodity according to the queried storage information. According to the technical scheme provided by the embodiment of the invention, the data loss or data tampering ofthe storage information of the commodity of each participation node can be prevented, so that the quality of the commodity can be reliably evaluated during commodity transaction.

The disclosure discloses an Internet of Things device control method combining a block chain and a central server. The Internet of Things device control method combining the block chain and the central server comprises the following steps: in the block chain established by a consensus network, the Internet of Things device expands through registering to the central server, so as to realize the communication with other registered devices; the central server or a MQTT message transfer server writes the information into the block chain, and then each participating node jointly maintains the device information recorded in the block chain; a mobile phone client (APP) and the device establish connection with the shared MQTT message transfer server through the Internet protocol after register, and then the APP and the Internet of Things device communicate in real time through the shared MQTT message transfer server with the Internet of Things protocol; and the device and the APP synchronize part of the data through CDN, and then write the own information to the block chain through the connected MQTT message transfer server.

The invention discloses a threat information exchange sharing method based on a block chain, and the method comprises the steps: 1),a threat information block chain system is set with the system comprising comprises a threat information block chain, a synchronization node, and a plurality of maintenance nodes; a user registers as a threat information block chain user, and obtains a corresponding public key and a corresponding private key; 2) a threat information producer sets intelligent contract content on the system, signs the intelligent contract content with a private key and then issues the intelligent contract content to a threat information block chain; 3) the intelligent contract content signed issued by the information consumer synchronously is threatened, a private key used to sign and the content is broadcast through the system; 4) a maintenance node analyzes the content in the smart contract and packages the content into a new threat information block A; 5) a block A is broadcasted to the system, the maintenance node adds the block A to the threat information block chain after consensus of the block A is achieved, and 6) the maintenance node achieves consensus after confirming the effectiveness of the smart contract, creates a new block B and broadcasts a new block B through the system.

The embodiment of the invention discloses a data processing method, related equipment and system. The data processing method comprises the following steps: writing acquired user information into a message queue by a service server, wherein the user information comprises user account information and user data information; reading the user information and storing the user information by a big data server from the message queue; calculating the user data information according to a preset rule to obtain a characteristic value, and storing the characteristic value and the user account information in an associated way and registering the characteristic value and the user account information in a blockchain to generate an associated registration message; extracting index information in the user data information, and generating index data according to the index information to establish an index directory; writing the associated registration message of the characteristic value and the user account information into the message queue; and acquiring the associated registration message by the service server from the message queue and storing the associated registration message. According to thetechnical scheme of the embodiment of the invention, a data owner can provide a data effective external service for a third party under the condition that the data owner has own data rights and interests.

The invention relates to a data access method and apparatus, a computer readable storage medium and a computer device. The method comprises the steps: receiving a data access request sent by each terminal; determining a storage mode of enterprise data corresponding to the data access request through an intelligent contract; when the storage mode is data uplink storage, obtaining enterprise data from a block node on the block chain and managed by a data provider according to the data access request; when the storage mode is data address uplink storage, searching an access address correspondingto the data access request at the block node, and obtaining enterprise data from an enterprise database according to the access address; and sending the obtained enterprise data to the terminal. According to the scheme provided by the invention, the authenticity of enterprise data can be ensured.

The invention provides a big data disperse uplink method and system, and the method relates to the field of big data, can be applied to the technical field of block chains and the financial field, and specifically comprises the steps: obtaining an uplink request of a user and a to-be-uploaded data file, and calculating the data file through a Hash algorithm according to the uplink request to obtain a first Hash value; comparing the first hash value with a hash value carried in the uplink request; when the first hash value is consistent with the hash value carried in the uplink request, segmenting the data file into a plurality of continuous data blocks according to a preset rule, and calculating a second hash value of each data block through a hash algorithm; and forming the data blocks into a chain structure through the second hash values of the data blocks, and uploading the data blocks in the chain structure to different nodes in the block chain network for consensus storage.

The invention discloses a monitoring method, system, device and equipment and a computer readable medium, and relates to the technical field of Internet of Things. One specific embodiment of the method comprises the steps that after label receiving equipment detects an electronic label of a product, product information of the product in the electronic label is submitted to a server, and the electronic label comprises a radio frequency identification label; the server updates the state of the product according to the product information and stores the state in a block chain; and the terminal queries a state corresponding to the product identifier in the blockchain through the server according to the product identifier. According to the embodiment, the reliability of monitoring the production process of the product can be improved.

The invention provides a data storage method based on a block chain. The data storage method comprises the following steps: S1, compiling a structured data object according to a multi-layer nested JOSN data format; S2, carrying out flattening operation on the first JSON data; S3, sorting the second JSON data according to the hierarchical size and letter size of the Key value; S4, encoding the Keyvalue and the Value value by using an RLP encoding mode of the Ethereum; S5, taking the RLP (Key) and the RLP (Value) as leaf nodes, constructing a Merkel tree, and calculating a root hash; S6, takingthe root hash as a first Key, taking the first JSON data or the second JSON data as a first Value, and storing the first JSON data or the second JSON data in a K/V database under a chain; and S7, defining the data type of the first JSON data as a first type, and uploading the root hash and the first type to a block chain. The data storage method based on the block chain has the advantages of tamper resistance, privacy, verifiability, high efficiency and the like.

The invention provides a system for establishing a rural credit system of a blockchain supply chain end. The system comprises an agricultural information cloud platform, an agricultural information supervision cloud platform, an agricultural source supply chain platform, a block chain platform and a rural supply chain end credit system platform. The agricultural information cloud platform and agricultural information supervision cloud platform data key nodes are uploaded to a block chain platform, tamper resistance is guaranteed, key data such as buying and selling, settlement flow and inventory of the rural supply chain platform are uploaded to the block chain platform, tamper resistance is guaranteed, and after the loan auditing and issuing process and issuing of the rural supply chain end credit system platform, the repayment condition of a loaned party is recorded in the block chain platform and cannot be tampered. The method has the advantages that a traditional information island, namely decentralization and non-tampering, is broken through, and the problems of difficulty in loan of an operation subject and the like are solved.

The embodiment of the invention provides an ownership registration method and an ownership proof method based on blockchain. An execution main body of the ownership registration method is in a blockchain network is a node corresponding to the ownership registration platform; the method comprises the steps that based on an ownership registration request sent by a user for a target work, a hash value corresponding to the target work is obtained, then a transaction is issued in a block chain, the transaction comprises identification information of the user and the hash value, and the transactionis recorded in a block of the block chain. Thus, the timestamp, the user identification information recorded in the block and the hash value are generated through the block of the block, and recordingof a certain work owned by a certain user at a certain time point is completed. In addition, in the ownership proof method provided by the invention, the node corresponding to the notarization position in the blockchain network can find the block recording the hash value according to the hash value of the target work to be proof, so that the notarization of the ownership of the target work is completed.

The invention relates to the technical field of vehicle information management, in particular to a vehicle information management method and device for vehicle information, computer equipment and a storage medium. The method comprises the following steps: acquiring a vehicle data set of a current node; obtaining a comparison feature set in a first block chain block corresponding to a previous node; performing feature extraction on the vehicle data set to obtain a current feature set, verifying the comparison feature set and features corresponding to the current feature set, and generating a matching report according to a verification result; and uploading the vehicle data set, the current feature set and the matching report to a second block chain block corresponding to the current node. By adopting the method, the vehicle information of the vehicle in each delivery link can be safely stored.