426 results about "Zero-knowledge proof" patented technology

The invention discloses a large model generation content traceability technology based on model copyright ID watermark embedding, which comprises the following steps that: firstly, a large model content generator compiles a dynamic watermark embedding process into an arithmetic circuit, and generates a watermark text and a proof by using a zero-knowledge proof algorithm; then the large model content generator publishes the text with the watermark and the proof together, and hides the copyright ID and the secret key; a large model content user verifies the proof and the watermarked text through a smart contract by adopting a zero-knowledge verification algorithm; after verification is passed, an adversarial sample corresponding to the text with the watermark is generated, an adversarial training method is used for optimizing the text with the watermark, and parameters of the Viterbi balance algorithm are dynamically adjusted and improved. According to the method, the concealment and the generation quality are balanced, high-capacity watermark embedding is realized, the tamper resistance and the accurate traceability of multi-model copyright disputes are improved, and the privacy protection intensity is improved.

The invention discloses a data ownership verification and authorization control method based on zero knowledge proof. The method comprises the following steps: constructing a traceable Merk tree structure on a block chain or a distributed account book; a data owner calculates data fingerprints and packages the data fingerprints into declaration nodes to be inserted into the traceable Merk tree; storing the ownership zero knowledge proof and the traceable Merk tree root hash into a block chain together; the verification party executes the zero-knowledge verifier contract on the chain to complete ownership verification without reading original data or identity plaintext; access control is realized after on-chain verification of the service party; triggering local heavy hash to update the traceable Merk tree root hash, and broadcasting a revocation event on a chain; and confirming legality of evolution and authorization change of all nodes. According to the method, the historical traceability and structural consistency of the data ownership and authorization relationship are ensured, and efficient traceability and anomaly detection of the node evolution chain are also realized.

The invention provides a data traceability verification method in a trusted data space, and relates to the technical field of zero-knowledge certification, the method comprises the following steps: collecting a plurality of operation records of target data in the trusted data space, and arranging the operation records according to a timestamp sequence to generate an operation sequence; converting into a state transition constraint condition; inputting the operation sequence into a pre-trained key node identification model, and outputting position identifiers of one or more key state transition nodes in the operation sequence; constructing a zero-knowledge proof circuit according to the operation sequence, the state transition constraint condition and the key state transition node, and operating the zero-knowledge proof circuit to generate a composite zero-knowledge proof; and providing the composite zero-knowledge proof as a data traceability voucher of the target data to a verification party to complete traceability verification of the whole processing process of the target data. The technical problems of privacy disclosure risk and low verification efficiency of data traceability verification in the prior art are solved.

Embodiments are directed toward a blockchain system including a global state and an assemblage of blocks, each block representing a collection of state transformation records, each state transformation record describing a state transformation performed on the global state, where preceding blocks referenced by any given block contain state transformation records describing state transformations performed on the global state prior to the evaluation of the given block, and where at least one state transformation record is a zero-knowledge transformation record encoding a zero-knowledge state transformation description, which zero-knowledge transformation record comprises at least the following elements: paths identifying the locations of the elements of a discrete data subset, a revised data subset, and a transition proof implemented as a non-interactive zero-knowledge proof, which transition proof proves that the transition from the discrete data subset to the revised data subset follows the established rules of the blockchain system.

The invention relates to the field of block chain technology and application security, and discloses a block chain-based APP data trusted storage and sharing method, which comprises the following steps of: maintaining a verifiable state container comprising state data and an access policy dual-Merkel tree under a chain, and recording a root hash of the verifiable state container in the block chain; for different updates, generating corresponding evidences: generating single-step evidences containing Merkel evidences for single-step updates; and generating the composite proof containing the zero-knowledge proof for the complex process. And the intelligent contract can update the root hash in an atomized manner only through verification and certification. During data sharing, data and dual Merkel proof are provided for a consumer to verify data authenticity and access legality. According to the method, complex calculation is arranged under a chain, low cost and constant overhead of on-chain verification are achieved, and meanwhile high-safety data credible storage and refined authority control capacity are provided through a dual-tree dual-certificate mechanism.

The invention provides a credible identity authentication method and system with privacy protection and traceability, and the method comprises the steps: S1, defining roles in an identity authentication process and a supervision traceability process and the function division of each role, including a user, a registration organization RA, a certificate issuer Issuer, a service provider SP and a supervision committee RegComm; s2, realizing an identity authentication process through a real name authentication verification process, an anonymous identity certificate signing and issuing process and a user identity authentication proving process; wherein in the anonymous identity certificate issuing process, a certificate issuer Issuer issues a verifiable anonymous identity certificate to a user through a formula according to a real name authentication verification result of a registration authority RA; and S3, realizing a supervision and tracing process through user secret distribution and a user information tracing process. According to the invention, an identity authentication process based on zero-knowledge proof and verifiable secret sharing is realized, a supervision and tracing process is introduced, and practical application requirements of privacy protection and traceability can be met at the same time.

The invention relates to the field of computer information security and access control, and discloses a block chain power data security sharing method. The method comprises the following steps: acquiring a data field list, a measuring point list and a configuration mapping table, executing naming specification, time anchor registration and de-identification processing, and forming a fixed field sequence and an on-chain index record structure; based on context legality verification and policy mapping, generating an access constraint policy and completing generation and binding of a one-time session token, solidifying a policy snapshot on a contract side and registering a validity period; zero-knowledge proof is constructed, witness materials are assembled, and dual-channel checking, event account falling and failure evidence registration are carried out through a verifiable session smart contract; and an end-to-end key negotiation and control channel is established, so that safe data minimum access and result sealing are realized. According to the method, credible sharing and traceable access of the power data among multiple subjects are realized, and the data security, compliance and chain governance capability are improved.

The invention discloses an access request verification method and device, a storage medium and electronic equipment. The method comprises the following steps: acquiring an access request sent by an application program; the verification operation is executed on the access request based on a zero-knowledge proof circuit, a verification character string is generated, the zero-knowledge proof circuit comprises a plurality of arithmetic gates, the zero-knowledge proof circuit is determined through permission constraint conditions, and the permission constraint conditions are used for indicating the access permission of the application program; the verification character string is used for indicating whether the access request is allowed to respond. The technical problem that the verification efficiency is low due to the fact that the verification process of the access request is complex is solved.

The invention provides a digital economic information management method and system based on big data analysis, and the method comprises the steps: integrating the data of a consumption end, a production end and a server end through a unified platform, guaranteeing the transmission safety through the combination of differential privacy and TLS 1.3, recording the full life cycle of data through a segmented block chain, supporting the dynamic authorization and fine-grained authority control, and improving the efficiency. The method comprises the following steps: verifying data purposes by combining zero-knowledge proof, fusing NLP, image processing and time sequence analysis, constructing a knowledge graph, generating dynamic tags and composite features, simulating decision influence through anti-fact analysis, supporting generation of a Pareto optimal solution by an interactive decision tree, and providing a market trend thermodynamic diagram and a supply chain risk graph. Customized suggestions are pushed to an ERP system in real time, sensitive data are protected based on role permission and lightweight homomorphic encryption, abnormal behavior monitoring and zero-knowledge proof compliance review are combined, a service scene is simulated through an A / B sandbox, and low-code community drives demand iteration.

The invention discloses a BIM and block chain-based construction whole process quality tracing method and system, and relates to the technical field of building construction quality management. In a material entering stage, material information is collected through the Internet of Things and is associated with a BIM component identifier, and an initial block is generated by using an intelligent contract; in the process execution stage, BIM 4D / 5D simulation data is associated with a construction log, and a Hash chain algorithm is adopted to generate a process block containing IPFS Hash; in the acceptance inspection stage, the consistency of detection results is verified through zero-knowledge proof, and a new block is generated; checking the block data through a consensus mechanism to obtain a complete data set; constructing a graph database index based on the BIM component tree, and generating a chain path graph; responding to a query request, traversing path diagram nodes, comparing hash values and outputting a tracing result; trusted communication, tamper-proof evidence storage and intelligent tracing of data in the whole construction process are achieved, and the accuracy and reliability of project quality management are remarkably improved.

The invention discloses an identity authentication method and system based on a national secret algorithm, and the method comprises the steps: building a hierarchical key management system based on a national secret IBE framework, generating a system master key pair through employing an SM2 algorithm, and achieving a decentralized key distribution mechanism; constructing a domain perception differential privacy protection module, defining a privacy budget allocation strategy according to the security level, and adding calibrated Laplace noise to the user identity feature vector; designing a distributed batch matrix multiplication protocol, and decomposing the distributed batch matrix multiplication protocol to a plurality of computing nodes for parallel processing through a secret sharing technology; a zero-knowledge proof verification mechanism is implemented, and identity verification is completed through a commitment scheme based on an SM3 hash algorithm; deploying a self-adaptive key updating strategy, and analyzing threat level change through a threat situation evaluation function; and establishing a secure communication channel based on SM4 symmetric encryption, and performing encryption processing by using the temporary session key. The security and expandability of the system are improved, the privacy of the user is effectively protected, and the system adapts to a dynamically changing network threat environment.

The invention discloses a blockchain zero-knowledge proof collaborative credit risk control data privacy protection query method, and belongs to the technical field of financial science and technology and information security. According to the method, a four-layer architecture of a feature importance analysis layer, a zero-knowledge proof verification layer, a block chain intelligent contract layer and an audit log layer is constructed, so that the contradiction between privacy protection and data availability in a traditional credit risk control system is solved. According to the system, an SHAP value is adopted to calculate feature importance, a zk-SNARKs verification circuit is deployed for high-sensitivity features, zk-STARKs lightweight verification is adopted for low-sensitivity features, and differential privacy protection is achieved. And dynamically adjusting the complexity of a verification algorithm according to the credit risk score of the user, and realizing dynamic authority control based on a verification result through an intelligent contract. The verification metadata is recorded to the block chain to form a tamper-resistant auditing log, and it is ensured that the query process is transparent and traceable. According to the method, the real-time risk control requirement is met while the privacy of the user is protected, and a compliant and efficient data query solution is provided for financial institutions.

The invention discloses a marketing activity-associated batch digital certificate generation and distribution method and system, and relates to the technical field of digital certificate generation, and the method comprises the steps: receiving a marketing activity arrangement rule, and screening a target user identifier list from a user database according to the marketing activity arrangement rule; based on the target user identifier list, generating a digital certificate record for each target user, constructing a lightweight Merkel tree based on target data of the digital certificate records, and performing calculation to obtain Merkel tree root hash; submitting the Merkel tree root hash to a block chain network for evidence storage, and obtaining an evidence storage transaction hash which is hash with the Merkel tree root; and distributing the digital certificate records to the users in the target user identifier list. According to the method, the zero-knowledge proof with hidden detail information is generated based on the certificate record and the Merkel path proof during verification, and the verification operation is executed to update the state after verification is passed, so that efficient generation, credible distribution and privacy protection verification of batch certificates are realized.

The invention relates to the technical field of software security and data credibility, and particularly discloses a flow document dynamic authority management and block chain auditing system and method. The system comprises an authority management module, an authority commitment and on-chain evidence storage module, a multi-party joint audit module and an anomaly detection and fusing module. The authority management module performs dynamic authority approval and adjustment based on a multi-domain strategy; the permission commitment and on-chain evidence storage module converts the permission change operation into a cryptographic commitment and stores the cryptographic commitment to the block chain; the multi-party joint auditing module generates auditing proof by using a zero-knowledge proof technology to realize compliance verification under privacy protection; and the abnormal detection and fusing module identifies abnormal access in real time and triggers fusing. According to the method and the system, the technical problems that the existing flow edition document authority management is static and rigid, the auditing log is easy to tamper, the privacy protection is insufficient and a real-time response mechanism is lacked are solved, and the comprehensive effects of dynamic and controllable authority, credible and traceable auditing and privacy security consideration are realized.

This disclosure provides techniques to utilize decentralized identifiers (DIDs) and verifiable credentials for secure, privacy-preserving transactions. In one aspect, a method is provided that includes: receiving user information; determining a DID based on the information; providing the DID to a user device; verifying the user's identity by validating the DID and associated verifiable credentials; and performing a transaction based on the verified DID. Other aspects are provided, such as generating a public-private key pair for the user, associating the DID with the public key, and / or creating a DID document stored on a distributed ledger accessible to authorized entities. Further aspects include processing transactions through smart contracts on a blockchain network, which may involve converting central bank digital currency to fiat currency while maintaining user privacy, applying transaction limits based on verified identity attributes, and providing zero-knowledge proofs to auditors to verify compliance without accessing underlying transaction details.

The invention relates to the technical field of medical data security, and discloses an electronic medical record data security sharing method based on a block chain. The method comprises the steps of receiving original data of different medical institutions through a multi-source medical data acquisition module and performing standardized cleaning to eliminate data format differences; generating a medical data block chain network by adopting a distributed account book construction module, and generating data blocks from the standardized data according to a time sequence; based on an attribute-based encryption strategy generation module, dynamically configuring patient node access permission granularity, and defining a medical record access range and a data service life of each node; calling the encrypted storage contract through an intelligent contract execution module, writing the electronic medical record into a block, and generating a chained hash verification value; when an external query request is received, the zero-knowledge proof verification module is triggered to generate validity verification parameters. According to the method, safe and controllable sharing of electronic medical records is realized, and cross-mechanism medical cooperation and medical research development are assisted.

Provided are a privacy-protection-based physical resource authentication method and apparatus. A target circuit logic is deployed in a first device involved in the method, and same comprises a calculation circuit portion and a generation algorithm portion. The method comprises: a first device generating, by using a first private key thereof, a first commitment for original resource data of a physical resource held by the first device; then at least inputting the original resource data and the first commitment into target circuit logic, verifying the first commitment by means of a calculation circuit portion, calculating conclusion data corresponding to the original resource data, and generating, by means of a generation algorithm portion, a zero-knowledge proof regarding the calculation correctness of the calculation circuit portion, so as to obtain first proof data, wherein the conclusion data indicates the health state of the physical resource and is used for resource value evaluation; and the first device then correspondingly storing the first commitment and the first proof data in a second device for the second device to verify the zero-knowledge proof.

The invention discloses a data management method and system for a data credible delivery platform. Access is realized through symmetric encryption of source data, and credible right confirmation is realized by relying on identities of owners and users of alliance chain evidence storage, source data hash and authorization rules; adding a timestamp to the encrypted data stream verified by the certificate to form a traceability mark, and encrypting or desensitizing privacy data; the trusted computing is provided with three modes: a local mode executes an algorithm in an ownership party isolation environment and records a log on a chain, a third-party mode constructs a trusted sandbox based on TEE, executes computing and links log hash after remote certification, and an algorithm privacy mode realizes cooperative computing through a Shamir secret sharing splitting algorithm in combination with MPC, a confusion circuit and zero-knowledge certification; and the result delivery adopts public key encryption, a decryption key is issued after the receipt of the user is verified, and the result hash and the receipt are linked for evidence storage, so that the problems that the existing trusted platform cannot support the execution of various algorithms and is lack of effective supervision are solved.

The invention relates to the technical field of block chains, in particular to an energy asset token coin model based on a block chain, which comprises an asset chaining unit, a Byzantine fault-tolerant grading coin unit, an intelligent contract execution unit, a data storage and verification unit and an on-chain incentive supervision unit. According to the invention, the privacy protection type credible uplink of the entity energy asset state is realized through Internet of Things acquisition, zero-knowledge proof and a decentralized oracle network, and efficient and fair coin-based authority management is realized according to a hierarchical consensus architecture, dynamic committee election and a differentiated authority distribution mechanism. The efficiency, the safety and the fairness of the coin casting process are guaranteed, a credible and ordered foundation is laid for subsequent intelligent contract execution, data evidence storage and incentive supervision, and compliance and efficient operation of the energy asset token coin process are jointly promoted.

The embodiment of the invention discloses a safety calculation method and device for robot cluster collaboration and a medium, and relates to the technical field of safety calculation, and the method comprises the steps: carrying out the participant authentication of a robot cluster and a production enterprise node in advance, and carrying out the dynamic identity verification of each robot after the participant authentication is passed, the operation feature data of each target robot passing verification are extracted and encrypted, and encrypted feature vectors are determined; splitting the encrypted feature vector into a plurality of data fragments, storing the data fragments to a distributed node, obtaining a predetermined task cooperation strategy, and distributing the task cooperation strategy to an edge computing node in a secret sharing manner; executing safety calculation in a ciphertext state through a task cooperation strategy and the plurality of data fragments, determining a joint motion control instruction of each target robot, and generating corresponding zero-knowledge proof data; and after the verification is passed, the encrypted control instruction is distributed through the block chain smart contract, so that safety calculation of robot cluster collaboration is realized.

The invention discloses an AI-driven block chain hybrid consensus dynamic hierarchy optimization method and system, and aims to solve the problems that an existing block chain consensus mechanism is insufficient in adaptability, low in intelligent contract execution efficiency, difficult in security and privacy balance and the like. A dynamic hierarchical adaptive hybrid consensus architecture is constructed, a hierarchical structure is adjusted in real time according to a service load, and super nodes are dynamically elected to process high-frequency transactions; predicting a load by combining a deep reinforcement learning model, and automatically selecting an optimal consensus combination; high-frequency data memory storage and low-frequency data distributed storage are realized through intelligent contract routing, and graphic processor acceleration nodes are allocated based on contract complexity; establishing a node reputation scoring system, verifying a reputation level in combination with zero-knowledge proof, and automatically switching to DAG asynchronous consensus and starting node cleaning when an attack in a specific numerical range is detected; the deep fusion of the hybrid consensus and the dynamic hierarchy is realized, so that the execution efficiency is improved. The high-frequency transaction processing efficiency is improved, and the complex contract efficiency is improved.

The invention relates to an environmental factor deduction carbon emission transaction method based on privacy protection, and belongs to the technical field of carbon emission data management. Comprising the steps of calculating and determining an effective result of the day based on observation data of each accounting subject, performing threshold signature and updating a global model; calculating the current-day voucher anchor hash; calculating a document deduction amount, a total voucher deduction amount and a final discharge amount by using the global model, generating a remote report and a corresponding standard hash, and outputting a three-item binding hash; constructing an aggregable zero-knowledge proof circuit, and jointly verifying a deduction equation, a membership relationship, uniqueness constraint and binding consistency in one proof; and verifying the threshold signature, the standard hash corresponding to the remote report, the three-item binding hash and the zero-knowledge proof in a single transaction to complete the transaction. According to the method, automation, credibility and traceability of the whole environmental factor deduction carbon emission transaction process based on privacy protection are realized, and end-to-end verifiable, low-cost and high-throughput carbon emission settlement is realized.

The invention relates to the technical field of medical marketing data sharing, in particular to a medical marketing data sharing method and system based on a block chain, and the method comprises the steps: compiling a plaintext description of a medical marketing business rule into an arithmetic circuit with a multi-port structure, generating a verification key, and deploying the verification key in a block chain smart contract in the block chain; the verification node initiates a verification request containing a data type, a service rule identifier and a time period identifier; the medicine enterprise node and the medical institution node respectively load the local privacy data to the input port and generate a corresponding first zero-knowledge proof and a corresponding second zero-knowledge proof; and the verification smart contract loads a verification key according to the time period identifier to carry out cooperative verification on the two zero-knowledge certificates and generates a conclusion for uplink storage. According to the method, cross-subject association verification is realized on the premise of not converging original data, and the accuracy and auditing performance of compliance judgment are improved through a time period self-adaptive threshold value.

A non-transitory, processor-readable medium storing instructions that executed by a processor, cause the processor to generate a new zero-knowledge proof (ZKP) for a transaction based on a correctness of a prior ZKP and a prior transaction. The processor is caused to generate a ZKP using data for a first transaction and embed that data into data of a second transaction, to generate a ZKP for the second transaction. The generated ZKPs can be verified by a smart contract on a distributed ledger network that executes the second transaction based on the verification of the ZKP of the second transaction, which in turn is verified if the ZKP of the first transaction is verified.

The invention discloses a block chain-based transaction data verification method and device, and an electronic device, and relates to the technical field of block chains, the verification method comprises the following steps: for each transaction processed by each node, based on a preset strategy evaluation model, determining a target encryption strategy for transaction data of the transaction; based on the target encryption strategy, encrypting transaction data of each transaction to obtain encrypted transaction data; generating a zero-knowledge proof for each encrypted transaction data, and generating a recursive proof of each node based on all the zero-knowledge proof; and verifying all transaction data of each node based on recursive proof. According to the invention, the technical problem that the verification efficiency of a large amount of transaction data is low in the prior art is solved.

The invention relates to the technical field of block chains, in particular to a method and a system for realizing unified security and credible authentication of multiple accounts based on a block chain technology, and the method comprises the steps: generating a globally unique decentralized identity (DID) and an asymmetric key pair through a digital identity wallet, and carrying out the uplink storage of DID related information; establishing a binding relationship between the DID and the multi-platform account through the smart contract, and keeping a tamper-proof record; when an external platform initiates an authentication challenge, a user signs a response through a private key, and the smart contract verifies the signature legality and the binding relationship; all the operation logs are chained through the auditing module to form a traceable track, and privacy protection is achieved in combination with technologies such as zero-knowledge proof and ring signature. The system solves the problems of account dispersion, mutual trust insufficiency, privacy disclosure and the like in a traditional centralized authentication system, has the advantages of cross-platform unified authentication, security and counterfeiting resistance, autonomous identity control of a user, audibility, expandability and the like, and is suitable for multiple scenes such as government affairs, finance, education, Internet of Things and the like.

Disclosed is a system and method for authentication with zero-knowledge proof used in environments where authentication is required.

The invention discloses an unmanned aerial vehicle cluster dynamic cross-domain key management method and system based on the Chinese remainder theorem (CRT), a key generation center generates system public and private keys and public parameters, and a ground station and an unmanned aerial vehicle perform hierarchical registration and verify respective keys; the unmanned aerial vehicles respectively generate signature messages and send the signature messages to a specified ground station for identity verification, and the ground station constructs a group key based on CRT and publishes the group key to the block chain; when a new unmanned aerial vehicle applies for joining, a signature message is sent to the ground station, and the ground station updates and publishes the group key; when the unmanned aerial vehicle applies for leaving, a leaving message is sent to the ground station, and the ground station updates and publishes the group key. According to the method, complex operations such as bilinear pairing operation and large integer modular exponentiation operation are avoided by optimizing the group key derivation process based on the CRT, and the calculation complexity is remarkably reduced. Meanwhile, efficient cross-domain authentication and batch verification are realized through Pedersen commitment and a zero-knowledge proof technology, and communication and calculation overhead is reduced.

The invention discloses a block chain-based battery full life cycle data tracing method and system, and the method comprises the steps: receiving verification request information sent by a battery pack manufacturer, calling corresponding parameter data from a storage server according to the verification request information, and carrying out the processing of the corresponding parameter data to generate a zero-knowledge proof; submitting the zero-knowledge proof, the encrypted data packet and verification request information to a data verification contract for verification, calling an authority management contract to modify the manufacturer access authority after verification is passed, collecting key operation through an audit tracking contract, performing uplink to generate a log record, and finally, according to the log record in the block chain network, performing data verification on the block chain network. The safe and traceable query of the full-life-cycle information of the battery cell is realized, the data privacy is ensured, and the credibility and high efficiency of the full-life-cycle information tracing process are ensured.

The invention relates to the technical field of block chains and secure transactions, and discloses a secure data transaction method based on a block chain exchange protocol key replacement attack, comprising the following steps: S1, a seller generates a Merkel root as an integral commitment based on an all-encrypted symmetric key; s2, the seller responds to the random challenge of the buyer and generates a composite zero-knowledge proof to confirm the validity of the key; s3, the buyer verifies the authenticity of the composite zero-knowledge proof; s4, the seller divides the main key and the private key, and the buyer calculates a verification target value and deploys an intelligent contract containing transaction fund; and S5, the seller submits the second key share to the smart contract to trigger automatic verification and atomized liquidation. According to the method, key replacement attacks are defended by using Merkel root commitment and zero-knowledge proof, atomic fair exchange is realized by combining key segmentation and an intelligent contract, and the security and fairness of transactions are ensured.