90results about How to "With decentralization" patented technology

The invention relates to a social network data interaction method and device. The method is used in a social network composed of multiple peer-to-peer network nodes. The method comprises the following steps that: a first network node publishes information to one or more other network nodes in the social network; the first network node participates in whole-network consensus verification of the social network on the published information by online network nodes in the social network; and the first network node writes the published information passing whole-network consensus verification in a block chain of the social network. The invention further discloses the social network data interaction device.

The invention discloses a block chain-based information-authenticating and source-tracing method. The method comprises the steps of (1) acquiring the copy of the original information to be issued by an original information publishing end; (2) generating the hash value of the copy and picking the content information of the copy at the same time; (3) creating the first transaction information based on the content information of the copy and the hash value of the copy; (4) writing the first transaction information into a center database and a block chain, or writing the first transaction information into the block chain; (5) acquiring the transshipment information released by a information transshipment end, and generating the hash value of the transshipment information; (6) comparing the hash value of the transshipment information with the hash value of the copy; if the two hash values are the same, returning a first voucher for representing the information to be true or non-tampered; if the two hash values are not the same, not returning the first voucher or returning a second voucher for representing the information to be not true or tampered. The invention further discloses a corresponding system. According to the invention, the information authentication and the source tracing can be reliably realized.

The invention belongs to the technical field of Internet of things, in particular to a product traceability information management system and method. The system adopts an up-chain and down-chain coordination mechanism to manage supply chain information: the manufacturer of a product supply chain collects, stores and manages the product information or the event information produced in the process of supply chain through the sub-system under the chain, and uploads the key traceability information with anti-tamper requirements, such as information storage certificate, information location, identity authentication evidence, etc. to the sub-system on the chain based on the block chain for storage and management; each link in the same supply chain is found through the functional modules of the subsystems on the chain to verify and share the data of the subsystems under each link in the supply chain to ensure the safety of the whole process. The invention solves the unauthorized tampering problem and the trust chain transmission problem faced by the traditional tracing system, improves the credibility of the product tracing system, and ensures the flexibility and scalability of the system.

The invention belongs to the technical field of confidential or secure communication, and discloses a V2G network cross-domain authentication method based on an alliance block chain and an informationdata processing terminal. For the security threat that the electric vehicle joins a power grid V2G network, a V2G network cross-domain authentication scheme based on an alliance block chain is provided; A V2G network trust model and a system architecture are designed, and a specific scheme is described in detail. Signature and authentication of the method both adopt the latest national password standard SM9 cryptographic algorithm; The characteristic that the block chain technology is not easy to tamper is utilized, the Hash algorithm is used for verifying the certificate, and the signature and verification times of the public key algorithm are reduced, so that the efficiency is high, and the expandability is high. The introduction of the block chain technology provides a new idea and method for solving the security problem of the smart power grid. The invention provides a high-performance cross-domain authentication scheme in a V2G network by utilizing a block chain technology and anSM9 digital signature algorithm.

The invention belongs to the technical field of safety communication between motorcades in Internet of Vehicles, and discloses a motorcade establishment and management method and system based on a block chain and a PKI authentication mechanism. The method is mainly divided into two parts of motorcade establishment and group key agreement and update; the motorcade establishment part comprises the following main processes of member registration, member identity authentication and group head aggregate signature; and the group key agreement and update part comprises the following main processes ofgroup key agreement and group key update for dynamic joining and exiting of a vehicle. According to the method and the system, the block chain is combined with the PKI authentication mechanism, a problem of identity authentication of the vehicle, a server and an RSU in the Internet of Vehicles is solved; the motorcade establishment is completed based on an elliptic curve, a bilinear pairing technology and an aggregate signature; and the group key agreement and update can be realized based on a DDH difficulty problem, the forward and backward safety is achieved, and the safety of member communication in the motorcade is ensured.

The invention discloses a method for realizing distributed file storage based on a block chain. The method comprises the following steps: setting a node sending network access request information as an initiating node, and setting a node receiving the network access request information as a receiving node; constructing, by the receiving node receiving the network access request information, response information, sending the response information to the initiating node, and broadcasting a message indicating that the initiating node accesses the network; and adding, by the initiating node receiving the response information, the ID of the receiving node to an ID list of the initiating node. According to the method disclosed by the invention, the P2P network architecture based on the Internet is adopted, each node located in the same network is mutually equivalent and jointly provides and jointly enjoys the network service, there is no special node, the topology between the nodes is organized not based on geographical positions, the nodes interconnected with a certain node may be far away from each other on the geographical positions; and the nodes interactively coordinate and cooperatively handle services, and the method has the advantages of reliability, decentralization and openness.

The invention relates to a food safety risk traceability analysis method and a system based on a block chain. The block chain technology is applied to a database layer and a communication layer of thesystem, and the visualization technology is applied to a service layer of the system. Data upload requires the initiator's digital signature to ensure that the data is not tampered with and that thedata is stored in the block chain. Data access is controlled by permissions to access data in the chunk chain by executing smart contracts. Use Force-Directed Graph and flow maps show the food risk traceability process. When tracing the source of food safety risk, the user can trace the source of food safety risk through Force-Directed Graph Drills up to trace the source, then down to track the flow of food, Force-Directed Graph drill-through operations are shown in conjunction with a flow map in which arrows indicate the flow direction of risky foods, where different shades of color representdifferent degrees of risk flow. The invention not only solves the problems of unsafe storage of the traditional food traceability data and the vulnerability of the central database, but also providesa friendly visual interaction interface for users.

The invention relates to a ciphertext retrieval fair payment method and system based on a block chain. The system comprises a data owner, a data user, a cloud platform and an intelligent contract deployed on the block chain. The encrypted data of the data owner is authorized to more than one data user for retrieval and decryption through the smart contract; the data user can initiate a search request when an authorization condition is met and enough search cost is stored in the smart contract; and the smart contract verifies the correctness and integrity of the search results returned by the cloud server, and after the verification is passed, the cloud server returns k search results with the highest relevancy to the data user. The problem of fair payment can be further solved.

The invention discloses a blockchain-based academic platform service system and establishing method, which belongs to the technical field of database. The blockchain-based academic platform service system comprises a system establishing phase module for the registration of authors and publishers, a publishing phase module for determining whether the easy author is forbidden to publish essays and for detecting repetitive publication, and a reporting phase module for reporting essays having academic cheating to the publisher. The invention is advantageous in that decentralization is provided, academic data can be prevented from being tampered or lost, and safety in opposing and rejecting service attack can be guaranteed; the academic integration mechanism can be disclosed, and repetitive publication and academic cheating can be dealt with in a transparent manner; the system scheme can be realized based on Ethereum testing network, and interaction between visualized Web interface and intelligent contract can be conducted, and design demand can be met.

The invention provides a distributed multi-AGV dynamic task allocation and path planning method and system. The system mainly comprises an upper task management host and a plurality of isomorphic AGVs. The upper task management host is responsible for task management and distribution, and the upper task management host is mainly composed of a task information management module, a bidding task distribution module and a host wireless communication module. The AGVs are responsible for respective task path planning and execution, and each AGV is mainly composed of an AGV wireless communication module, an AGV task management module, an AGV bidding module, a single task path planning module, a task sorting module and a task execution module. According to the method, decentralized management among multiple AGV individuals can be realized, so that the problems of large calculation amount and low efficiency of path planning under dynamic tasks are solved. The efficiency of AGV execution of all tasks is improved, the management cost of a warehouse is reduced, the operation efficiency is improved, and the method has a relatively good application prospect.

The invention relates to the technical field of a block chain, in particular to a parking credit adjustment method based on a block chain, a device thereof and an electronic device. The parking creditadjustment method based on the block chain comprises the following steps: obtaining illegal information, wherein the illegal information includes user information, and the user information is configured with the user's credit account; triggering an intelligent contract running on the block chain to adjust the credit score of the credit account according to the violation information; generating block chain data containing credit scores of a user's credit account; validating the block chain data by consensus and storing the block chain data in the block chain. Because the block chain has the characteristics of non-tampering, decentralization and high transparency, which can provide reliable and highly transparent parking credit.

The invention belongs to the technical field of block chains, and specifically discloses a block chain-based shared electricity transaction method. The method comprises the following steps of: puttingforward an electricity purchasing contract or electricity selling information by a user, publishing information by a system and writing the information into a smart contract; and purchasing a contract or electricity by a purchaser user, automatically controlling an electricity meter by the smart contract so as to send electricity to an electricity user and send digital currency to an electricityseller, and updating a storage structure. According to the method, characteristics such as decentralization, non-tamperability and traceability of block chains are utilized to provide a safe, reliableand trustable electricity transaction method for users without third-party mechanism endorsement, so that the electricity transaction flexibility is improved and the earnings are improved under the condition of removing the third-party mechanism endorsement. The method can be used for the fields of electricity transaction in communities and electricity transaction in cities.

The invention discloses a medical data sharing method and system based on a block chain. The method comprises the steps: a first medical database signs the number of medical data to be shared and a target hospital identifier by adopting a first private key and sends the signatures to an on-chain smart contract, and the target hospital identifier is written into a corresponding sharing list throughpermission check; a second medical database uses a second private key to sign the number of the medical data to be shared and the target hospital identifier and sends the signatures to the on-chain smart contract, and the hospital fingerprint and the corresponding hash value of the second medical database are determined through permission check; the second medical database acquires the encryptedmedical data object from an interstellar file system cluster and sends a decryption key request; the first medical database determines a decryption key according to the sharing list; and the second medical database decrypts the medical data object according to the second private key and the decryption key. Thus, the data security of medical data sharing is improved, and the sharing performance isgood.

The invention discloses a natural bacteriostatic hand washing solution and a preparation method thereof. Raw materials of the hand washing solution comprise the following components: 30 to 40 parts of a surfactant, 10 to 15 parts of a thickening agent, 8 to 10 parts of an antiseptic, 10 to 12 parts of active carbon, 10 to 15 parts of rosemary essential oil and the balance being water. The preparation method of the natural bacteriostatic hand washing solution is simple, and the preparation process is convenient. The natural bacteriostatic hand washing solution provided by the invention is prepared from pure natural raw materials, is safe, nontoxic and green, and meanwhile has functions of sanitation, health and skin care. Soya lecithin has functions of emulsifying, dispersing, foaming and moistening; pectin has a thickening effect; active carbon can absorb stains, sterilize, remove smells, prevent mildew and detoxicate; the rosemary essential oil has delicate fragrance and can restore consciousness, promote blood circulation and condition skin; and cassia seed extract has antiseptic and bacteriostatic functions.

The invention discloses a college student digital personal credit investigation method based on a blockchain intelligent contract. The method comprises the following steps: a student node uploads a personal credit information original file to a storage layer, then deploys an intelligent contract containing personal credit basic information into a block chain network, and broadcasts the personal credit information original file through a consensus whole network, and each user node accesses the personal credit information original file by calling each module function of the intelligent contract.Based on the blockchain intelligent contract technology. The method is based on the blockchain intelligent contract technology, and has the characteristics of decentralization, public transparency, no tampering, convenience in tracing and reliability in database; and any user connected to the blockchain network and provided with the blockchain digital wallet can deploy the own intelligent contract, so that the credit investigation information of the user can be managed. According to the method, the problems of serious information centralization and serious counterfeiting of the existing digital personal credit investigation system are solved.

The invention requests to protect an electronic evidence storage method based on a block chain smart contract, and the method comprises the steps: carrying out the evidence storage through the smart contract by a evidence storage person, carrying out the query of evidence information through the smart contract by a verification person, carrying out the evidence downloading through the smart contract by a researcher, and carrying out the uploading of an evidence analysis result through the smart contract. The smart contract is a key logic module for realizing the method and exchanges data withthe block chain, so that the integrity, the verifiability and the tamper resistance of the electronic evidence are ensured. And meanwhile, all data operations are recorded on the block chain, so thatthe traceability of the electronic evidence is realized.

The invention relates to the technical field of a block chain, in particular to a commodity information maintenance method based on a block chain, a block chain node and a system thereof. The method comprises: receiving a commodity purchase success request sent by a common node, wherein the commodity purchase success request comprises a commodity name, a number and a digital signature; the digitalsignature is generated by a private key; the public key generated by the private key is broadcasted in a block chain; and the block chain stores a commodity list list of the relationship between eachcommodity name, the number and the purchase status; verifying the digital signature against the public key; when the digital signature is legal, the purchase status corresponding to the commodity name being set to the purchased status in the commodity list list, the commodity list list being updated, and the updated commodity list list being packaged into block data; the block data being sent tothe consensus node so that the consensus node verifies the block data. Because the block chain has the characteristics of non-tampering, decentralization and high transparency, which can provide reliable commodity information.

The invention discloses a comprehensive energy marketization transaction architecture and method based on a block chain. The blockchain technology is applied to the market transaction of each participant of the comprehensive energy. Based on the technical advantages of blockchain decentralization, openness, transparency, safety, credibility, information traceability, tamper resistance and the like, an equal credibility and information sharing marketization transaction architecture is established in the comprehensive energy system, and point-to-point energy transfer and transaction settlement of each participant are realized. According to the transaction architecture and method provided by the invention, an energy management mode from bottom to top can be formed in the comprehensive energysystem, and electricity, heat, cold and other energy supply and demand subjects can perform trusted transaction and scheduling without depending on a third party, thereby facilitating safe and stableoperation of the comprehensive energy system, improving the energy utilization efficiency and maximizing the benefits of each party.

The invention provides a reinforced mixer with ultrasonic dispersion and temperature control functions. The mixer mainly comprises a planetary gear stirring mechanism, a lead screw sliding table, a case mechanism, an inner container, a heating ring, an ultrasonic vibration head, a beaker, a temperature sensor, a one-chip microcomputer and a control panel. An inner gearing big gear wheel of the planetary gear stirring mechanism is connected with a sleeve to form one body through interference fit; a revolution fixing mechanism controls stable rotation of a planetary gear; a driving motor drives running of a planetary gear train to realize a stirring function; a screw joint at the end part of a fixed axle balances torque of the planetary gear train, and the screw joint and a butt nut bear the weight of the planetary gear train and the stirring mechanism together. The side surface of the sleeve is provided with a fixed rod connected with a slide block of the lead screw sliding table; a stepping motor controls rotation of a lead screw so as to realize elevation and falling of the stirring mechanism; the inner container is embedded into the upper surface of a case, the ultrasonic vibration head is adhered on the lower transverse plane of the inner container, and the heating ring is fixed at the lower end of the inner container, thereby achieving heating, ultrasonic dispersion and mechanical reinforced stirring functions.

The invention relates to the technical field of block chain information sharing, and particularly discloses an intelligent law and regulation platform based on a block chain technology. The platform comprises a smart block chain module, a trusted data lake module, a data analysis module and a service platform. The smart block chain module is used for creating, managing, operating and maintaining asmart law data block chain, and comprises three hierarchical structures including a block chain account book edge calculation layer, a block chain consensus node cloud layer and a sub-chain layer; the trusted data lake module is used for performing data management on data of a block chain in the intelligent block chain module, and the data management sub-module comprises a data acquisition module, a data storage module, a data analysis module, a data application module and a data management module. According to the law and regulation platform, a system with credible data, decentralization, data sharing, high intelligent degree and unified data standard is established, and the intelligent law and regulation platform based on the block chain technology is provided.

The invention belongs to the technical field of network information security, and relates to a multi-person participation BIM drawing copyright protection system and method based on a block chain. Theprotection system comprises a user operation module, a digital signature extraction and verification module, a BIM drawing modification submitting module, an intelligent contract module and a block chain storage module. On one hand, the system achieve a BIM drawing multi-person collaborative design function through combination of a block chain technology, an asymmetric encryption algorithm and anintelligent contract technology, can accurately record a modification record identifier of each designer and uplinks and stores the modification record identifiers, and provides a powerful proof forthe work contribution of the designer; and on the other hand, a copyright division function is set for the BIM drawing completed by cooperation of multiple persons, copyright affiliation division is decided by all designers, and the BIM drawing creation process and copyright division details are recorded by adopting the non-tamperable characteristic of the block chain, so that the fundamental benefit of each creation contributor is guaranteed.

A shared house leasing system based on a block chain comprises an information uploading module, an information retrieval module and a link module, and a lessee uploads house source information to theblock chain through the information uploading module; the leaseholder searches a required house resource through the information retrieval module; and the link module determines the unique communication identifier of the lessee equipment corresponding to the selected housing resource according to the operation of the lessee for selecting the required housing resource from the housing resources tobe selected, and establishes a point-to-point communication link between the lessee equipment and the lessee equipment corresponding to the unique communication identifier, so that the lessee and thelessee directly perform point-to-point transaction. A new shared house leasing business model is realized by using a block chain technology, information is transparent and cannot be tampered, leasingtransaction has no participation of an intermediary agent, house leasing and check-in can be realized in an unattended manner, and information security is ensured; and the lessee and the lessee can directly carry out point-to-point transaction on the business, so that the efficiency is high. The invention further provides a shared house leasing method based on the block chain and a storage medium.

The embodiment of the invention provides a file signature processing system. The system comprises a signature device and a signature verification device. The signature device is used for determining atarget file to be digitally signed and calculating a first information abstract value of the target file, obtaining a first private key and a first public key of the signer, performing encryption calculation on the first information abstract value by using a first private key to obtain a first digital signature, and correspondingly storing the first digital signature, the first information abstract value and the first public key into a block chain distributed account book. The signature verification device is used for calculating a second information abstract value of the target file when a verification instruction is received, judging whether a second information abstract value exists in the block chain distributed account book or not, and if not, determining that the target file is tampered. Thus, the digital signature can be stored in the block chain distributed account book, so that the validity of the digital signature is ensured, and the security of the data is improved. And thedigital signature can be verified, so that whether the file is tampered or not can be verified.

The invention discloses a block chain-based electric vehicle shared charging credible system and method. The system comprises a private pile owner, a charging pile operator, an electric vehicle user, a shared charging service platform and a trusted environment of a block chain network. Pointers are added for a block structure for rapid search, multi-party contracts are automatically executed to achieve contract content of safe calculation, and a reputation-based incentive mechanism for high-quality charging service is provided. And a shared charging multi-party participation trust environment is established from three aspects of secure storage, secure calculation and secure excitation.

The invention discloses a network node security attribute evaluation method based on blockchain consensus result feedback, which enhances the credibility between network nodes by combining a consensusmechanism of a blockchain, and has the characteristics of tamper resistance, traceability, decentration and the like. By establishing a security attribute evaluation mechanism based on a trust mechanism, security attribute evaluation is carried out to judge the security of each network node, and secure communication between the nodes is realized.

The invention discloses a silica gel cooling fin. The silica gel cooling fin is characterized in that the silica gel cooling fin comprises the following components in parts by weight: 50 to 60 parts of methyl vinyl polysiloxane mixture, 50 to 60 parts of silane coupling agent, 5 to 10 parts of silicon dioxide, 0.1 to 0.3 part of platinum catalyst, 0.01 to 0.03 part of alcohol retarder, 10 to 15 parts of aluminum hydroxide, 0.1 to 0.5 part of peroxide, 30 to 40 parts of heat conducting powder, 1 to 5 parts of heat stabilizer and 1 to 5 parts of antioxidant. The silica gel cooling finprovided by the invention avoids the problems of scorching, whitening, long vulcanizing time and the like in a preparation process, the quality of the silica gel cooling fin is good and the rate of finished products is high.

The invention discloses a block chain-based PKI certificate system model and a certificate management method, which are used for optimizing the performance problem caused by introducing a block chain into a PKI system by introducing an RSA accumulator technology. Based on a block chain PKI system model, transparency and traceability are provided in an unsafe internet environment, operation of the CA on the digital certificate is uploaded to a block chain jointly maintained by multiple parties through coupled block chain nodes, and the method has the characteristics of decentralization and CA behavior traceability. The RSA accumulator technology is introduced, and the scheme is proved through knowledge, so that a large number of digital certificates are prevented from being stored on the block chain, and the storage space is compressed. Aiming at the characteristics of a digital certificate management full life cycle and an RSA accumulator, a digital certificate management method based on a block chain and a double RSA accumulator is provided, and all participants of a PKI system can locally verify the legality of the digital certificate through the accumulator state disclosed by the block chain in combination with the digital certificate and a corresponding proof.

The invention discloses a big data management system and method applying a block chain technology, and relates to the technical field of blockchain. The big data management system comprises a databaselayer, a block chain layer, a data sharing layer and a data application layer. The big data management system realizes big data management by adopting a blockchain technology, constructs an architecture system comprising a database layer, a block chain layer, a data sharing layer and a data application layer, and realizes data interaction by fully utilizing the characteristics of decentralization, tamper resistance, distributed common accounting, asymmetric encryption, data security storage and the like of the block chain technology. By adopting an encryption function and a decryption function, the big data management system realizes encryption and decryption of big data, and improves the data security performance. In addition, the big data management system adopts a sharing algorithm, realizes data sharing in the blockchain, fully utilizes a sharing mechanism, has the advantages of decentralization, detrust, data encryption and the like, and can well solve the data management problemexisting in big data application.

The invention discloses an alliance type non-performing asset block chain and storage, privacy protection and consensus methods based on the block chain. The method comprises the following steps: (1) a storage method for storing a hash value of picture data on a chain; (2) a privacy protection method for controlling access authority and data hiding, comprising a privacy protection model for controlling the access authority of an organization to each database and a privacy data protection method based on CES, and selectively and verifiably hiding privacy data through content extraction signatures; (3) a Fabric consensus optimization scheme based on VRF is adopted, and Leader election is controlled by setting Listener; the method has the advantages that the problems of information asymmetry and efficiency of the non-performing asset market are solved, the privacy security of non-performing asset transaction is guaranteed, the Fabric consensus is improved, and the security and the resource utilization rate of the non-performing asset transaction can be improved.

The invention relates to the technical field of a block chain, in particular to a commodity distribution method based on a block chain and a system thereof. The method comprises the following steps: acommon node sends a takeout order order request to a proxy node; the agent node executes an intelligent contract according to the takeout order request to generate a payment code, and sends the takeout order request and the payment code to a node server corresponding to the node address reserved in the intelligent contract, wherein the payment code comprises commodity information; the common nodesends a request to the agent node; the agent node executes an intelligent contract according to the order robbery request to determine the identity information of the target distribution personnel, and sends the identity information and payment code of the target distribution personnel to the common node; and the agent node executes the intelligent contract according to the order robbery requestto determine the identity information of the target distribution personnel; the node server establishes an order list of mapping relationships among takeout order request, payment code and the identity information of the target delivery person. Because the block chain has the characteristics of non-tampering, decentralization and high transparency, the method and system can provide a platform forfair delivery of takeout.