181results about How to "Guaranteed to be tamper-proof" patented technology

The invention discloses a blockchain access authentication method and device, a storage medium and an electronic device, wherein the method comprises the following steps: obtaining an access request of a first account, wherein the access request is used for the first account to request to access a service blockchain node; responding to the access request, and determining a first access authority of a role belonging to the first account based on the permission data saved on the target blockchain node, wherein the data writing permission of the target blockchain node is closed after the saved permission data are written; in the case that the first access permission indicates that the first account is allowed to access the service blockchain node, the status of the business blockchain node isset to allow the first account to access. The blockchain access authentication method and device in the present invention solve the technical problem that the security of the permission data in the related art is low.

The invention discloses an identity authentication server and an identity authentication token, wherein the identity authentication server comprises a standard FIDO server and a storage space for storing keys, namely, a database, which are connected with each other; the identity authentication token is based on physical unclonable and the FIDO U2F protocol and comprises a U2F module, and a PUF module,a TRNG module, a USB module and an interaction module, which are connected with the U2F module, and a touch module connected with the interaction module; and an identity token interacts with a client browser, and the client browser in turn interacts with an FIDO server in the authentication server. According to the identity authentication server disclosed by the invention, the physical unclonable function is combined with the FIDO, the uniqueness and non-replicability of the token are ensured by the physical unclonable function, and the accuracy of the user identity and the non-defective modification and non-repudiation of the operation are ensured by the FIDO.

The invention relates to an Internet of Things data privacy protection method based on a block chain and the trusted hardware. The method comprises three stages of secret key management and data generation, data access control strategy definition and intelligent contract deployment and data access and intelligent contract execution, and Internet of Things data is encrypted by a hardware trusted entity IDA and uploaded to a cloud for storage; when there is an operation request, the trusted entity calls an access control authentication interface of the smart contract to carry out authority authentication; after the authority authentication passes, the trusted entity carries out security authentication on the operation execution server and sends the secret key to the data operation executionserver through a security channel; and the server downloads the data from the cloud, then decrypts the data and executes the operation, and writes the data use record into the block chain after the data analysis operation is completed. According to the scheme, the block chain is combined with the trusted entity, the data is effectively operated under the condition that the original data privacy isnot leaked, and the integrity and the safety of the data use records are guaranteed.

The invention discloses a block-chain-based data processing method, device, apparatus, and storage medium. The method comprises the following steps: receiving a data inquiry request sent by a data requesting node; the data inquiry request at least includes a data demand type and a query demand; searching target user data matching the demand side type and the query demand from a block chain based on an authorized access rule in an intelligent contract; feeding back the target user data to the data requesting node. The invention can effectively avoid the leakage of user information and improve the security of data.

The invention relates to the field of prepaid cards, and discloses a prepaid card transaction data storage method and device. The prepaid card transaction data storage method includes generating a plurality of transaction records of the amounts of transfer from a plurality of merchant accounts to a user account during recharge of the user account of a prepaid card and storing the transaction records to a block chain, expenditure presentation information of the plurality of transaction records including the user account; and when the user account of the prepaid card performs consumption, generating a transaction record of the consumption of this time according to preset transaction rules and storing the transaction record to the block chain, account entering information of the transaction record of the consumption of this time including a prior transaction record of which expenditure presentation information includes the user account which is determined according to the transaction rules, and expenditure presentation information of the transaction record of the consumption of this time including a target account and sum of consumption of the consumption of this time. The prepaid card transaction data storage method and device can ensure non-tamperability, verifiability and traceability of the transaction records.

The invention discloses a data processing system based on a block chain. The system comprises: an infrastructure layer consisting of a portal, a client and N servers based on peer-to-peer network communication. Each server establishes an initial block of a block chain and maintains a block chain. A processing layer is used for realizing the data interaction and processing between the system application layer and the infrastructure layer. The layer comprises a data uploading module, a single block verification module, a data query module, and each server of the infrastructure layer in the periodic block chain verification module periodically verifies the correctness of the self-maintained block chain. The application layer is used for calling the module of the processing layer according tothe request of the user, and realizing the access control in this layer. By utilizing the embodiment of the invention, the system query data efficiency and the resource utilization ratio are higher than those of other block chain processing systems.

The invention provides a method and device for achieving electronic contract signing. The method comprises the steps that identification information of an electronic contract signing user is received,and a real identity of the electronic contract signing user is determined according to the identification information; when it is determined that the real identity of the electronic contract signinguser is correct, an electronic contract which is signed by the electronic contract signing user is received, and an electronic signature is added to the electronic contract, wherein the electronic contract comprises a handwritten signature picture of the electronic contract signing user; the finally formed electronic contract is encrypted and stored. In this way, online electronic contract signingcan be achieved, and through real-name authentication information and the electronic signature, the authenticity, validity and non-falsification performance of an online signed file can also be guaranteed.

The embodiment of the invention provides a distributed power transaction system and method based on a block chain. The system comprises a distributed power transaction platform and a plurality of distributed power transaction user nodes, wherein the types of the distributed power transaction user nodes comprise a power supply user node and a power purchase user node, the power supply user nodes are used for submitting quotation information to the distributed power transaction platform, and the power purchase user nodes are used for freely selecting the power supply user nodes according to ownpower purchase requirements and quotation information and achieving power transactions with the selected power supply user nodes; and the distributed power transaction platform is used for managing the identity information of the distributed power transaction user nodes based on the block chain, checking and publishing the quotation information submitted by the power supply user nodes, verifying the power transaction between the power purchase user nodes and the power supply user nodes, generating an aggregation signature, and uploading the aggregation signature to the block chain. According to the invention, reliable distributed power autonomous transaction between a power producer and a user can be realized.

The invention discloses a symmetric searchable encryption method based on a block chain, and belongs to the technical field of computer cryptography. The method comprises a data storage scheme in which the ciphertext data is stored in a block chain and the ciphertext indexes are stored in a cloud server, an efficient symmetric searchable encryption algorithm is used for the generation of encrypteddata, ciphertext indexes and query tokens, and a query scheme of the ciphertext data based on the block chain. According to the invention, the user data is stored in the block chain; so that the tamper resistance of the user data is ensured; the index file is stored on the cloud server, the calculation is carried out by utilizing strong computing power with the server, the ciphertext data are searched, a user inquires that a transaction needs to be initiated and a deposit is submitted, integrity of the user and the cloud server is ensured by using a reward mechanism and a punishment mechanism, and the mutual cheating of the cloud server and the user is prevented.

A flexible block chain framework is provided. A block chain is divided into a first layer of log consensus chain, a second layer of contract logic execution chain and a third layer of state variation consensus chain. The complexity is reduced, and the stability and performances are improved. The first layer of log consensus chain is unmodifiable, other chains are allowed to be modified, but consensus can still be performed, and consistency is maintained; if codes of the second layer of intelligent contract are wrong, the intelligent contract codes can be updated, transaction results are recalled according to data on the log chain, and the third layer of block chain is updated.

One or more embodiments of the present specification provide an enterprise authentication and authentication tracing method, device and equipment based on block chain, the authentication method comprises: receiving an enterprise authentication request sent by a client, the enterprise authentication request comprising to-be-authenticated enterprise information, legal person identity information andauxiliary authentication information; authenticating the identity of the enterprise according to the enterprise information, and authenticating the identity of the enterprise legal person according to the legal person identity information and the auxiliary authentication information; and if the identity authentication of the enterprise is passed and the identity authentication of the enterprise legal person is passed, generating an enterprise authentication record, and writing the enterprise authentication record into the block chain. According to the embodiment of the invention, based on thetrusted execution environment of the block chain, the authentication process of the enterprise is transparent and visible in multiple directions, the credibility and notarization of the authentication process of the enterprise are realized, the authentication result is linked, and the tamper resistance and judicial effectiveness of the authentication result and the traceability of the authentication process of the enterprise are ensured.

The invention provides a manufacturing industry cross-domain heterogeneous data identity construction and tracing method based on a block chain. The method comprises the steps that firstly, a data tracing proxy is preset in the multi-data processing stage of an intelligent manufacturing industry supply chain collaborative cross-domain system, and data interaction with the block chain system is achieved through the proxy; a data tracing proxy extracts data internal fingerprints which can be shared and are written into a database of each enterprise, a lightweight elliptic curve feature extraction algorithm is designed by combining external association attribute features of the data, internal and external cause joint features are further extracted and signed, and a data credible security label combining internal and external factors is constructed. Secondly, an intelligent contract is called, in the multi-data processing stage of the supply chain cooperative cross-domain system, a recordis generated and stored in a data mapping logic chain in a block chain, a multi-party consensus mechanism based on the block chain and a tamper-proof characteristic are combined with the automation capability of an intelligent contract in the block chain, and multi-scale and multi-data processing stage data identity chain tracing is realized.

The invention discloses a block chain technology-based distributed power generation quality evaluation method and apparatus. The method comprises the steps of firstly classifying nodes of a distributed power generation system into sub-nodes, partial nodes and complete nodes; and secondly, sending online transaction records and evaluation functions of the sub-nodes to the subordinate partial nodes and all the complete nodes, and performing storage in a block chain mode. Compared with the prior art, the method has the advantages that the distributed power generation evaluation functions and transaction information data of the nodes are sent to the partial nodes and all the complete nodes of a region where the nodes are located; random hashing is performed at the partial nodes and the complete nodes; the distributed power generation related data information is added with time stamps; and block packaging is performed to generate a block chain of the complete nodes and a block chain of the partial nodes. Therefore, the data loss risk can be lowered, the data is ensured not to be tampered, and the cost of a database framework is properly reduced.

The invention discloses an electronic data safekeeping system and method based on the double and asymmetric encryption technology. The system has the advantages that all electronic data submitted by a party involved is stored in a server of a certifying institution, and the certification institution participates throughout encryption and decryption processes for the electronic data, so that tampering of the data during storage can be prevented; the electronic data submitted by the party involved is fixed through verification of an MD5 value and a timestamp, so that completeness of the original data can be ensured, and tampering of the original data can be prevented; and through the double and asymmetric key encryption technology, when the party involved applies for a certification, the party involved and the certifying institution need to successively carry out double decryption of the encrypted original data through private keys, the original data needs to be obtained, and the MD5 value and the timestamp need to be verified, so that the data can be prevented from being tampered or denied, the completeness and confidentiality of the data can be ensured, and the rights and interests of the certifying institution and the party involved can be guaranteed.

The invention discloses an electronic invoice generation method based on digital signatures. The method includes the steps that according to a request of an enterprise, a tax bureau end generates an empty electronic invoice file with the tax bureau digital signature according to content, serving as original text data, of the empty electronic invoice file and sends the empty electronic invoice file to the corresponding enterprise end; when filling in and issuing an electronic invoice, the enterprise end obtains the empty electronic invoice file with the tax bureau digital signature and conducts signature verification on the tax bureau digital signature, and if the signature passes verification, the electronic invoice is issued on the empty electronic invoice file according to order information and the enterprise digital signature is generated according to the content, serving as original text data, of the issued electronic invoice and is stamped on the electronic invoice; the enterprise end transmits the issued electronic invoice file and additional data of the electronic invoice to the tax bureau end in the form of file streams after the issued electronic invoice file and the additional data are encrypted; the tax bureau end decrypts received file stream data and verifies the obtained enterprise digital signature, and centralized storage of the electronic invoice is conducted in a tax bureau if the enterprise digital signature passes verification.

The invention relates to a multi-party fair contract evidence storage method based on a block chain technology. Activated management mode of digital data storage technology is realized by utilizing ablock chain technology and a CA digital certificate system, and management processes such as initialization addition, updating and freezing of storage data are mapped into a transaction list form of ablock chain network; the evidence storage data is confirmed by signatures of multiple evidence storage parties and is written into the transaction bill; the storage process is written into the blockchain global account book data after the storage multi-party confirmation and the whole network consensus verification of the block chain network; A management mode of the stored data which cannot betampered, cannot be denied and does not have a single-point fault is formed, and the problems that in the current centralized storage technology, a credit single-point dependence problem exists generally, and the stored original data cannot be recovered after the single-point fault are solved.

The invention discloses a unified identity authentication method based on a block chain, comprising the following four stages: 1. phase of user registration: a user registering with an annual ring server using his mobile phone number to obtain the certificate issued by the annual ring server CA; 2. phase of user binding identity: the annual ring server cooperating with a public security departmentto verify the identity of the user online with face, and recording the user identity verification result on the block chain; 3. phase of user attribute binding: the user initiating a binding requestfor the attribute to the annual ring server, and the annual ring server binding various attributes of the user to the block chain; 4. phase of user attribute presentation: the user presenting the successfully bound property to a relying party. Compared with the prior art, the positive effects of the present invention are that: the block chain technology ensures the incomprehensible modification ofvarious identity information of the user, and on the other hand, the cryptographic means is used to ensure the privacy of the user identity.

The invention provides an electronic contract block chain structure and an electronic contract signing device and method, and belongs to the technical field of electronic contracts. An electronic contract signing application system and an electronic contract block chain are included. The electronic contract signing application system comprises a user login authentication module, a secret key management module, an electronic signature module, a data encryption and decryption module, a contract auditing module, a contract chaining module, a contract signing module and a data acquisition module.The electronic contract block chain comprises an interface service module, a transaction construction module, an intelligent contract module, a state control engine, a block chain transaction accountbook and a large file storage engine. Trusted trusteeship is provided for the electronic contract through the block chain technology, and it is guaranteed that big file data of the electronic contractis safely stored and cannot be tampered; the signing process of the electronic contract is truly and credibly recorded based on the block chain, the whole process is traceable, the signing state of the electronic contract is intelligently changed in real time, and the credibility of the signing state is guaranteed.

The invention provides a block chain-based data processing system and method, computing equipment and a storage medium. The block chain-based data processing system comprises a request client, a business end, a server end and at least two block chain nodes on a block chain, the information storage node corresponds to a block chain node of the block chain, and receives and stores the case information of the user; the request client sends a case auditing request to the service end; the service end receives the case auditing request, determines a project member meeting an auditing condition, provides an auditing channel for auditing the to-be-audited case for the project member meeting the auditing condition, and receives case auditing data generated by auditing the to-be-audited case by the project member; and the server side pulls the case audit data from the block chain node, determines a case audit result according to the case audit data, and returns the case audit result to the request client side.

The invention discloses a medical record secure storage access method based on a block chain network, and aims to solve four core problems in the medical record EMR field at present: 1) how to safelyand effectively store the EMR of a patient, 2) how to upload the EMR in real time, and 3) how to set access control to filter illegal persons. and 4) how to facilitate cross-domain downloading of theEMR provides an electronic medical record ERM storage and management framework based on a block chain technology, and the framework can well solve the privacy and security problems of user data.

The invention discloses a blockchain management system for sports health data contribution incentive. The system comprises an activity event application module used for providing sports event services / activity services, a big data management module used for collecting, storing, analyzing, confirming and trading sports health data, and a blockchain module used for generating block data and realizing data contribution incentive protocols and data validation protocols. Activity participants participate in the fitness activity through an activity event operation module and provide fitness activitydata to the big data management module in a format specified by the activity event operation module, the participants in the event receive a certain amount of reward, moreover, each party of the activity participants is driven and promoted to receive a reward, and the Token in a blockchain module encryption system is used as a reward certificate for data contribution. The system is advantaged inthat the blockchain token is taken as the certificate, participation, data sharing and promotion of national fitness activities are stimulated, the parties are made to achieve encouragement and compatibility, and national fitness is promoted.

The invention discloses a method and a system for multi-code traceability and anti-counterfeiting. The method comprises the following steps: identifying and obtaining first identification informationbased on a graphic identification code on a scanning product package; displaying a query interface when the first identification information is identified; obtaining a character identification code onthe surface of the product to be inquired inputted by the user based on the inquiry interface; outputting product traceability information of the product to be inquired according to the character identification code on the surface of the product to be inquired, wherein product traceability information includes the production information of the product to be inquired in the whole production process, and the pre-configured graphic identification code corresponding to the character identification code, and the pre-configured graphic identification code corresponding to the character identification code is used for verifying the authenticity of the graphic identification code on the product package. The present application traces the entire production process of a product by combining an identification code on the product package with an identification code on the surface of the product, realizes the purpose of product traceability, and reduces the probability that the product is forged.

The invention relates to a system configuration tool and model cloud system bidirectional checking interaction method. The method comprises the steps that an intelligent substation system configuration tool requests to download an ICD model file from a model cloud system; the intelligent substation system configuration tool conducts signature verification on function information of the ICD model file; the intelligent substation system configuration tool conducts consistency verification on the ICD model file obtained after signature verification and an SCD model file stored in the intelligent substation system configuration tool; and the intelligent substation system configuration tool uploads the SCD model file passing consistency verification to the model cloud system. By adopting the method of achieving system configuration tool and model cloud system bidirectional interaction and conducting on-site configuration model checking, system configuration tool and model cloud system bidirectional interaction can be guaranteed, the problem that an on-site configuration model is inconsistent with the model cloud system is avoided, and meanwhile the model authenticity, the unavailable tampering property and the off-line model and on-line model consistency of on-site configuration are guaranteed by conducting digital signature verification and on-line dynamic model checking.

The invention provides an application evaluation method and device based on a block chain network, and the method comprises the steps: receiving a transaction which is submitted by an application market platform and comprises the evaluation information of an application through a node in the block chain network, and packaging the transaction into a new block; performing consensus verification on the transaction according to the digital signature and the digital certificate of the application market platform carried by the transaction; when the consensus verification is passed, adding the new block to the tail of a block chain used for storing evaluation information in the node, and updating a state database in the node through the evaluation information in the new block; receiving a transaction proposal for query submitted by the application market platform or the application market client, and according to the contract identifier and the contract parameter of the intelligent contract,executing intelligent contract calling, querying evaluation information conforming to query, constructing a proposal response, and returning the proposal response to the application market platform or the application market client, so that the integrity and reliability of the evaluation information can be realized.

The invention discloses a data security tracing method and device based on a block chain, and the method comprises the steps: collecting operation log data for executing a preset operation on target data,wherein the preset operation comprises at least one of the following operations: adding, deleting, modifying and checking; storing the operation log data to an operation log chain of each node ofthe blockchain network, the operation log chain storing hash values corresponding to the operation log data; superposing the hash value corresponding to the operation log data to an information display page for displaying the target data; and based on the hash value extracted from the information display page, querying operation log data which is stored on the blockchain network and performs a preset operation on the target data. According to the invention, the data security of the data on the data platform in the storage, use and sharing processes can be ensured.

The embodiment of the invention relates to the technical field of data storage, and in particular, to a big data storage method and device based on a blockchain. The big data storage method based on the blockchain can "split" the big data to be stored into first on-chain data and first non-on-chain data according to the storage capacity of the block; and when the first data capacity of the first on-chain data satisfies a storage capacity requirement, the first on-chain data and the first non-on-chain data are encrypted, and the first on-chain data is stored to the block; therefore, the storageof the big data in the blockchain can be realized, and the limits of the big data on-chain storage are improved.

The invention relates to a single-node bookkeeping method, system and device based on a block chain and a storage medium. The method comprises the steps that an accounting node initiates a backup request, wherein the backup request is used for indicating a core node in a block chain network, and a plurality of backup nodes are selected from the block chain network according to the backup request and a corresponding block identifier after the backup request is recorded to a traditional block chain; the accounting node acquires a plurality of backup nodes and establishes network connection witheach backup node; when the target data is obtained, the accounting node triggers to generate a corresponding target block, and records the target block to a single-node accounting block chain corresponding to the accounting node, wherein the target block comprises a block hash value of the previous block, a data hash value of the target data and a digital signature corresponding to the block hashvalue and the data hash value; and the accounting node sends the target block to the corresponding backup node for backup through network connection. By adoption of the method, the transaction quantity per second can be increased under the condition that the data reliability and non-tampering performance are ensured.

The invention relates to the speech evidence preservation, providing and justice field, in particular to a speech evidence perpetuation method and a speech evidence perpetuation device. The speech evidence perpetuation device comprises a telecommunication service platform, a recording platform, a cloud server and a data perpetuation center, and is structurally characterized in that the recording platform is connected with the telecommunication service platform and the cloud server, and the cloud server is connected with the data perpetuation center in communication mode. The speech evidence perpetuation device and the speech evidence perpetuation method achieve automatic recording and bidirectional recording through variable mode transfer connections of the telecommunication service platform, and simultaneously a third party performs the recording, and a mode of preserving a sound recording file at a cloud end is adopted, and therefore authenticity, reliability and tampering prevention performance of the sound recording file are guaranteed.

The invention discloses a medical safety tracing method and system based on a block chain. The method includes the following steps: S1, medical data is saved to a main node of a block chain; S2, medical institutions collect medical data during medical treatment; S3, experts and doctors make medical plans according to the medical data and sign the medical plans, and the record is saved to the blockchain and broadcasted; S4, the state of illness is judged; if the illness is mild, a patient gets medicines and then goes to the nurse station for transfusion to complete treatment; or, surgical treatment is arranged, preoperative physical examination is carried out, the result is saved to the block chain, and the method goes to S5; S5, surgical treatment is carried out, and the signature data during operation is saved to the block chain; S6, after treatment is completed, the medication and vital signs of the patient are recorded regularly, saved to the block chain and updated in real time; and S7, after the patient is discharged from the hospital, the daily medication of the patient is recorded in real time and saved to the block chain. The method and the system have the advantage that:through the information anonymity and decentralization of the block chain technology, medical institutions can obtain medical data through private keys under the permission of patients to achieve information sharing.

The present invention provides a charity institution supervision and management method based on the novel block chain structure, the characteristics that the block chain technology cannot be tampered,decentralized and the like are utilized, and public transparency of material and fund flow direction information is achieved; a block chain system is modified and innovated, a charity mechanism mainchain and a plurality of information side chains are designed, a block chain network composed of a plurality of charity mechanism branch chains is built, the problems that a single chain is difficultto trace back and targeted information is inconvenient to search are solved, and third-party government mechanism examination is better facilitated; a PoS consensus mechanism is improved, the reputation score of a charity institution is combined with a PoS consensus algorithm, the PoS consensus mechanism based on a reputation score white list is formed according to the characteristics of a plurality of branch chains of a block chain network, and blocks are generated through a large number of credible nodes to jointly maintain the safety and stability of a block chain. The credit score is usedas a work evaluation standard of charity institutions, a reward and punishment mechanism is set through an intelligent contract, and examination of a third-party government institution is carried out,so that strict supervision and urging effects on charity institutions are realized.