175results about How to "Cannot be tampered with" patented technology

The invention discloses an authentication method and device based on a blockchain. The method comprises the following steps: generating a roll-out private key for transferring digital assets through the blockchain and a corresponding roll-out public key according to a random number; carrying out coding treatment on the roll-out public key, and generating a roll-in address; carrying out digital signature on the basis of the roll-out private key, a transferring numerical value of the digital assets to be transferred and the roll-in address; acquiring digital asset transferring data on the basis of the transferring numerical value, the roll-in address, the digital signature and the roll-out public key; and broadcasting the digital asset transferring data into the blockchain so that the digital asset transferring data are subjected to first-grade authentication by an authentication side, or are subjected to multi-grade authentication by a server side and the authentication side jointly after first-grade authentication is finished. Therefore, by the embodiment, hacker attack ability can be improved, and safety requirements of data and transaction in a blockchain open environment can be met.

The application discloses a digital certificate management method which comprises the steps of: receiving a digital certificate uplink request sent by a node in a block chain, wherein the digital certificate uplink request comprises a to-be-checked digital certificate generated by the node by using a private key signature and is used for requesting to write the to-be-checked digital certificate into the block chain; determining a result of carrying out consensus checking on the to-be-checked digital certificate of the node; and according to the result of consensus checking, determining whether to write the to-be-checked digital certificate into the block chain. The application further discloses a corresponding device, electronic equipment and the like.

The embodiment of the application discloses an identity authentication method based on a block chain, an authentication server and a user terminal, and belongs to the technical field of identity identification. The method comprises the steps of: according to an identity authentication request sent by the user terminal, acquiring an authentication factor of the user terminal; according to the authentication factor, creating a smart contract, wherein an operation result obtained after a preset operation is carried out on the authentication factor is pre-stored in the smart contract; broadcasting the smart contract into the block chain, and sending a smart contract block chain account address to the user terminal; and according to an execution result obtained after the user terminal executes the smart contract by utilizing the authentication factor, carrying out identity authentication, wherein when the execution result is matched with the operation result, success of identity authentication is confirmed, and when the execution result is not matched with the operation result, failure of identity authentication is confirmed. Therefore, the identity authentication method in the embodiment of the application has very high safety.

The invention discloses a security encryption authentication module for power distribution terminal communication and a method thereof. The security encryption authentication module comprises a main control chip, a commercial code algorithm encryption chip, a communication interface and a storage unit; the main control chip is connected with the commercial code algorithm encryption chip, the communication interface and the storage unit and receives message information of a front-end processor of a distribution master station and a distribution terminal through safe interface software of the distribution terminal to overall manages the other modules, and the commercial code algorithm encryption chip encrypts or decrypts the message information received by the main control chip. The special encryption chip is adopted in the security encryption authentication module, response speed is increased, and dependence on a CPU and an internal storage is reduced. Besides, communication security is greatly improved by means of bidirectional authentication of verifying each other's identity between the security encryption authentication module and a distribution security interaction gateway.

Embodiments of the invention provide a construction verification method and device capable of verifying a security two-dimensional code offline. The method comprises the following steps of inputting information that needs coding and type information, carrying out digital signature operation and encryption operation on the input information according to an information release type, constructing combination information, and encoding to generate a security two-dimensional code which can be verified off-line according to a two-dimensional code coding rule; inputting the information of the security two-dimensional code and identifying included combination information and type information, analyzing and decoding the combination information to obtain independent sub-information according to the type information of the two-dimensional code, and verifying digital certificate effectiveness information, a digital signature of the input information and an effective time limit of the input information; and if all verifications pass, showing that the offline verification of the security two-dimensional code is correct and the coding information source of the security two-dimensional code is credible, otherwise showing that the information release source of the security two-dimensional code is incredible. The method and the device have the beneficial effects that the security two-dimensional code cannot be tampered, counterfeited and denied, the public or private information can be released, and the integrity of the information of the security two-dimensional code and the authenticity of the source can be verified offline without a network connection.

The invention discloses a commodity tracing method and system based on blockchains. The method includes: a plurality of equivalent service nodes form a decentralized service network used for recordinga detailed process of circulation of commodity tracing codes as block data; and production enterprises, and dealers and retailers at all levels are regarded as different categories of user nodes connected to a service platform, tracing code data related thereof is obtained and saved, and related business operations are performed. Each commodity is endowed with a unique commodity tracing code, when the commodity is circulated between the dealers, the tracing code data is circulated between the user nodes of the dealers, the circulation process of the commodity tracing codes is traced, and thetracking of the commodity circulation process is accomplished. The system is used for implementing the method. The method and the system are advantageous in that the principle is simple, the operationis simple, and the problem of commodity tracing can be basically solved.

The invention relates to a public key infrastructure system based on a block chain, and a certificate management method thereof. The public key infrastructure system comprises a user u, a plurality ofCAs, a plurality of block chain maintainers BLM, a block chain and a client, the user u sends a signature request to the plurality of CAs, the plurality of CAs separately perform signature and feed back the same to the user u; the user u merges the signatures in a singed certificate issue affair and sends the same to the block chain maintainers BLM; the block chain maintainers BLM verify and store the signatures in candidate blocks of the block chain, and send proves of existence of the singed certificate issue affair CI-signed to the user u; and the client requests a certificate from the user u, the user u replies the domain name and the block chain maintainers BLM, and the client sends a query and verification request to the block chain maintainers BLM to query the state of the certificate and make response. By adoption of the public key infrastructure system, simple, convenient and efficient management of the certificates are achieved, and the problem of single point fault of CA can be avoided.

The invention provides a block chain privacy protection system and method based on homomorphic encryption. The privacy protection system comprises an authentication center which is used for carrying out identity verification, issuing a certificate and periodically checking an account book; The block chain nodes are used for collecting transactions, verifying the transactions, sorting the transactions and generating blocks; Wherein the block chain nodes comprise a preprocessing node, a confirmation node and a sorting node; And a user: one user corresponds to one confirmation node. According tothe block chain privacy protection system and method based on homomorphic encryption provided by the invention, the block chain privacy protection scheme can realize transaction information confidentiality; The blockchain privacy protection scheme can ensure that the transaction information cannot be tampered; The blockchain privacy protection scheme can ensure transaction legality; The re-encryption function in the blockchain privacy protection scheme is secure.

The invention discloses a supply chain finance block chain application method based on a sovereign block chain technology. The invention relates to a block chain field and especially relates to a sovereign block chain field. By using the method, problems that supply chain financing rate is low; a supply chain can not high-efficiently achieve a credit function; and a supply chain finance ecosphere cooperation development is restricted are solved. In the invention, based on the sovereign block chain technology, a block chain application platform suitable for China supply chain finance is constructed so that safety and traceability of supply chain finance application are increased. Mutual trust is established and transaction cost is reduced. Productivity of each node of a whole supply chain and a fund utilization rate are increased. A supervision node is provided for a supervision mechanism and whole process links of the supply chain finance are supervised.

The embodiment of the invention discloses a method and a device for storing work record. In the embodiment of the invention, a first block chain node transmits the obtained work record to each secondblock chain node to perform consensus verification, and each second block chain node stores the work record into a block chain if the consensus verification is passed.

The invention discloses a blockchain-based anonymous information transmission method and device, and a readable storage medium. The method comprises the following steps: receiving, by a client, information distributed by a blockchain mechanism, a first public key list and a ring signature parameter required for generating a ring signature, and obtaining information to be transmitted correspondingto the information distributed by the mechanism according to the operation of a user of the client; performing ring signature on the information to be transmitted by using the ring signature parameter, other user pubic keys in the first public key list and a private key corresponding to the public key of the client to obtain an information signature; and sending the information to be transmitted and the information signature to the mechanism, so that the mechanism, receives the information to be transmitted and the information signature and uploads the information to be transmitted and the information signature to a blockchain after determining that the information signature is in an effective state. By adoption of the blockchain-based anonymous information transmission method and device disclosed by the invention, the anonymous information transmission is realized; and by writing the information to be transmitted and the corresponding information signature into the blockchain, the non-tampering of the information to be transmitted is achieved by the characteristics of the blockchain.

The invention relates to a system for constructing a trusted node network. The system comprises a block chain management module, a node management module and a node identification module. Block chainmanagement module is responsible for the management of node member information on the block chain, that is, read, write, look up the node information of the block chain, as well as the read and writeprivileges management of the node block chain; the node management module is responsible for the joining and exiting of the node members on the block chain and the information management of the node network members. The node authentication module is responsible for authenticating the trustworthiness of other nodes on the block chain communicating with the node. The technical scheme is a decentralized trust system and peer-to-peer identity authentication mechanism based on block chain and public key technology, which is used to construct a trusted and controlled node network, and solve the security problems of single point failure, DoS attack, forgery and tampering in the centralized mechanism. There is no centralized trust and authority center in the technical scheme. What the new technical scheme establishes is a decentralized, distributed trust system and admittance mechanism maintained by the network node group.

The invention discloses a credit data storage method, a credit data storage device, computer equipment and a storage medium. The method comprises the steps of newly constructing a block when detectingthat credit information is transferred to a block chain, and writing the credit information into the newly constructed block to obtain a current block chain; if a credit query request is detected, sending the credit query request to each block of the current block chain; enabling each block in the current block chain to correspondingly execute a smart contract for the credit query request to obtain an execution result, and sending the execution result to another newly constructed block; verifying the newly constructed block through each block in the current block chain to judge whether the newly constructed block conforms to an endorsement strategy; and if the newly constructed block conforms to the endorsement strategy, adding the another newly constructed block into the current block chain. With the method, the effects that the data size of the collected credit information is large, the correlation is relatively high and the data cannot be tampered are implemented, and the accuracyof the credit information is guaranteed.

The invention relates to a method and system for providing advertising to the taxis through radio network. It comprises: grouping the taxis participating the network; the audio and video advertising program to be released is coded into stream media program and is allocated to the taxi group; editing program menu for each taxi group; after framing, using sliding window and multipath multi session approach to send down the program file to the relevant taxi group through internet or mobile communication network; the taxi receives and saves the advertising, and the price-marking weigher controls the play of program; when there is customer on the taxi, the advertising programs is played according to the program menu; when there is no customer on the taxi, the play of advertising program is ended.

The invention discloses a method for achieving data security communication by applying a blockchain encryption technology, and relates to the technical field of data encryption. According to the invention, a secure communication system comprising a data layer, a data encryption layer, a data network layer, a data transmission layer and a data application layer is constructed; a block chain technology is integrated into data communication, safe transmission of data is realized, the transmitted data can be shared and cannot be tampered, the encryption performance of the data is improved, remote,online and real-time acquisition and application of the data can be achieved through systematic construction, and a user can achieve application, management and monitoring of database data without going to the site personally. According to the invention, the ant colony algorithm is adopted; according to the characteristics of data communication and the requirements of interaction equipment, the optimization search of the encryption algorithm is carried out among the plurality of encryption units, so that a user can quickly find out the optimal value of the target data suitable for applicationfrom the plurality of encryption algorithms, and the efficiency and the data management capability of the encryption unit application algorithm are greatly improved.

The invention discloses an enterprise fixed asset management method based on a block chain, and relates to the technical field of data processing. A block chain is deployed, a block chain is used as a decentralized distributed storage technology; according to a model for recording data of events in each link of a fixed asset life cycle; an intelligent contract is deployed to realize data writing on the block chain; according to the technical scheme, the assembly data of all links of the enterprise fixed assets in the whole life cycle are written on the block chain, so that the related events of the enterprise assets in the whole life cycle are credible and cannot be tampered, and the whole life cycle of the enterprise fixed assets can be confirmed and tracked through the flow of the enterprise fixed assets in the whole business.

The invention provides a media file encryption key management method, system and device, and a storage medium. the media file encryption key management method comprises encryption key generation, andthe encryption key generation comprises the following steps: obtaining a random number; Obtaining key frame data in the media file, and calculating an abstract of the key frame data; And carrying outoperation on the random number and the abstract of the key frame data to generate an encryption key, and taking the encryption key as an encryption key of the media file. By adopting the method, the device and the system, the cost is reduced;, the key generation does not completely depend on the random number generator; Key frame data of a media file are doped in an encryption key of the media file; Through the technical scheme, the encryption key of the media file is more difficult to crack, and meanwhile, whether the media file obtained through decryption is consistent with the media file before encryption can be verified through the key frame data, so that the integrity of the file is ensured, and internal personnel cannot tamper the media file.

The invention discloses a management and control method for key information basic data asset based on block chain. The method comprises an external interface module, an application service API interface, a middleware data transmission module, an intelligent contract module, a block chain network node database count db module and a local node data storage module. The application service API interface is respectively connected with the external interface module, the middleware data transmission module and the local node data storage module, and the middleware data transmission module, the intelligent contract module, the block chain network database count db module and the local node data storage module are sequentially connected. The local node data storage module stores a plurality of pieces of original file data. The method has the advantages that whether key information basic data assets are counterfeited or not can be determined, tampering factors are determined, and therefore standard management and control are achieved.

The invention discloses a biological authentication method for resisting privacy disclosure, which solves the problem of information disclosure in the process of storing and authenticating biological characteristic information, and comprises the following steps: 1) registration phase: a user Ui registers a user name IDi and auxiliary information Wi from an authentication server (AS) through a sensor (S), and registers reference biological template relevant information Bi from data base (DB); and 2) authentication phase: the user Ui provides the current new biological characteristic information for the authentication server (AS) through the sensor (S), the authentication server cooperates with a database to judge the authenticity of the user identity by calculating the new biological characteristic information, the Wi and the Bi, and the authentication server returns the final authentication result to the user. Because the reference biological template information of the user is stored in the authentication server and the database respectively, the authentication information calculated by the database cannot be falsified without the reference biological template information stored on the authentication server.

The invention discloses a credit-increasing financing platform system and method based on a block chain, and a storage medium, the block chain platform obtains a target transaction bill correspondingto a target enterprise from transaction bills stored in a credit management platform, and when a node in the block chain completes a transaction, the transaction bill corresponding to the transactionis stored; obtaining a characteristic value of the target transaction bill in a preset dimension; obtaining a first credit score corresponding to the feature value through a big data collection, analysis and calculation credit platform, taking the sum of the first credit score, a second credit score corresponding to the blockchain platform and a third credit score guaranteed or mortgage by a thirdparty as a credit score, and determining a financing limit through the credit score; and sending the financing quota to a node corresponding to the target enterprise. According to the invention, thetransaction data is locked, cannot be tampered, traceable and credible through the blockchain technology, the financing limit is evaluated according to the real transaction data, the situation that the enterprise transaction data is false is avoided, and a more reliable credit-increasing financing platform is established.