9 results about "Distribute hash table" patented technology

The application relates to the technical field of data security, in particular to a cloud file destruction and data tracing method and system, which comprises the following steps: a distributed hash table algorithm is used to analyze a physical storage unit set of a cloud file to be destroyed; a chaotic sequence multiple overwriting operation is used to forcibly clean the physical layer; a storage unit state flip matrix is collected in real time, and a Shannon entropy value is calculated; a cryptography destruction certificate is generated after the Shannon entropy value breaks through a safe destruction baseline; and finally, the certificate is encapsulated into a terminal block of a full life cycle tracing chain. In the application, the chaotic overwriting based on the entropy value detection is executed by analyzing the physical storage unit set, and the residual magnetic characteristics of the data in the physical layer are forcibly destroyed, so that the hidden danger of false deletion in the cloud environment is solved, the unalterable destruction evidence is established in combination with a chain locking mechanism, and the safe closed loop of the data full life cycle is realized.

The application belongs to the technical field of cloud computing and information security, and discloses an education resource sharing method and system based on cloud computing. The method carries out structural analysis on online course resources uploaded to a cloud platform, defines a user role attribute model based on an education scene, constructs an access control policy tree based on an attribute-based encryption mechanism, adopts a distributed hash table to store fragments of the resource ciphertext, and generates a resource positioning index. When a course resource access request is received, the education attribute set of the requesting user is verified, and a learning path perception mechanism is combined to determine whether the user meets the decryption condition and chapter unlocking condition of the access control policy tree. The course access record, learning duration, test score and credit acquisition record of the learner are recorded to an education alliance chain to generate a verifiable learning record certificate, thereby realizing access tracing and auditing. The technical problems of coarse education resource access control granularity, weak anti-stealing broadcast capability and low learning record credibility are solved.

This invention discloses a management method for trusted blockchain data, belonging to the field of trusted data technology, comprising the following steps: S1, constructing a four-layer architecture of "privacy enhancement layer - dynamic consensus layer - cross-chain collaboration layer - value mining layer," with each layer achieving collaborative linkage through intelligent interfaces; S2, the privacy enhancement layer adopts a scheme integrating zero-knowledge proof, homomorphic encryption, differential privacy dynamic noise injection, and blockchain key sharding management; S3, deploying an enhanced adaptive consensus switching mechanism in the dynamic consensus layer; S4, constructing a cross-chain mapping network based on a distributed hash table in the cross-chain collaboration layer; S5, introducing an enhanced federated learning framework in the value mining layer. This invention, employing the above-mentioned management method for trusted blockchain data, allows the strength of privacy protection to adapt to scenario requirements, significantly improves the identification and response speed of malicious nodes, enhances cross-chain collaboration capabilities, and makes data value mining more accurate.

The application discloses a kind of centerless hardware trust identification generation and authentication method based on PUF, belong to information security technical field.The application relies on the physical unclonable feature of PUF chip, and PUF feature drift is handled by combining error correction code and auxiliary data processing fuzzy extractor, and stable hardware native fingerprint is extracted;Stable characteristics are mixed with double salt factor, and local trusted UID is generated by SM3 algorithm of national secret;Based on UID and PUF feature, unique SM2 key pair is derived by HKDF-SM3 algorithm and validity is verified;Three-level layered key system is constructed, and key derivation is completed using SM4-CBC mode;Trusted UID, dynamic data are combined to complete SM2 signature of national secret, and one-time two-dimensional code is generated to realize double offline authentication;Centerless public key synchronization and authentication result traceability are realized by combining distributed hash table and alliance chain, without central control and special medium, native compatible national secret algorithm, solve the core problem of PUF stability and centerless public key distribution, realize the real centerless hardware trust authentication.

A kind of concealed mobile query method based on blockchain and distributed hash table, first, construct the distributed hash table DHT network BDN based on blockchain enhancement BDN;Then, in the query scene under BDN, by mobile user initiates request and is completed by the concealed cooperation of adjacent user.BDN, blockchain is used as backbone network, bears the core function of transaction processing and smart contract execution;DHT network is used to access the geographic information of user, to support user mobile query.Query-oriented user concealed cooperation and behavior verification are respectively run on side chain and main chain network;Blockchain data layer accesses the user information in DHT network by index and storage interface;Message type in the P2P communication protocol of blockchain network layer is expanded to support information transmission in DHT network;Full node in blockchain bears the function of DHT network storage node;Smart contract guarantees the security of DHT access;MPT is introduced to optimize data index and retrieval.

The application discloses a kind of multi-dimensional resource perception edge flow task processing methods based on distributed hash table, it is applied to the edge network environment of the heterogeneous edge computing node group composition.To each node establishes resource description model, flow processing application is abstracted as directed acyclic graph topology;Three-tier decentralized flow processing architecture including edge physical network layer, structured overlay network layer of fusion multi-dimensional resource perception routing algorithm and dynamic flow data abstraction layer is built;According to topological sorting, each operator calculates independent hash routing key and encapsulates deployment message injection overlay network;In the process of hop-by-hop routing of deployment message, node computing load, available memory, physical communication delay and logical hash distance are included in comprehensive cost evaluation;Through instant interception mechanism, intermediate node actively carries operator instance, realize the efficient adaptation of logical topology and physical resource, reduce flow processing application deployment time and end-to-end query delay.

This invention provides a method for storing and distributing algorithms in a computing constellation based on Distributed Hash Table (DHT), comprising: constructing a distributed hash table network based on multiple satellite nodes in the computing constellation, and assigning each satellite node a unique node identifier in the distributed hash table network; mapping multiple algorithm files in a preset algorithm library to the distributed hash table network through hash operations, and storing them in the satellite nodes corresponding to the hash operation results; when the source satellite node receives remote sensing observation data, determining the target algorithm identifier based on the remote sensing observation data; if the source satellite node's local cache lacks the target algorithm identifier, determining the target satellite node storing the target algorithm in the distributed hash table network based on the target algorithm identifier; and sending the target algorithm from the target satellite node to the source satellite node, thus solving the problems of low inter-satellite bandwidth utilization efficiency and high task response latency.

This invention discloses a data fusion-based intelligent lupus monitoring system and its application in a smartwatch, covering the field of lupus monitoring. The system includes modules for data acquisition, preprocessing, fusion, disease assessment, early warning, storage and management, user interaction, model updating, personalized analysis, and telemedicine. Data is first collected from a smartwatch and medical devices, then denoised, normalized, and features extracted. A deep belief network is used to fuse the data to derive comprehensive health indicators. An LSTM and attention mechanism model is used to assess the disease condition. Threshold-based early warnings are set based on the assessment results and trend predictions. Distributed hash tables and blockchain are used to store and manage the data. A multi-terminal interface is developed, and the model is updated using federated learning and transfer learning. Lupus disease is assessed based on multiple datasets, and 5G communication technology enables remote doctor-patient interaction. This invention monitors the disease condition in real time, provides timely warnings of abnormalities, offers accurate disease assessment, optimizes the allocation of medical resources, promotes the development of telemedicine, and contributes to lupus research.