4results about How to "Realize immutability" patented technology

This invention discloses a multi-tenant end-to-end data security isolation and control system and method, belonging to the field of vehicle network data security. It aims to solve the problems of easy data crosstalk, discontinuous isolation, unreliable trust benchmarks, and difficulty in compliance traceability in multi-tenant scenarios. The system generates a tenant root identifier (TID) for vehicle enterprise tenants, which, together with the device sub-identifier (DID), forms a tenant identifier chain. This chain is synchronized with a trusted authentication center to establish a vehicle-cloud hardware-level trust root. When the vehicle terminal accesses the system, it completes two-way identity authentication and allocates a dedicated message queue telemetry transmission MQTT topic partition and access permissions according to the TID. The terminal collects time-series vehicle control data and generates encrypted data frames with intrinsic identifiers and checksums for uploading. The access gateway performs dual isolation verification before transparent transmission. Data is forwarded to an independent logical storage partition for isolated storage according to the TID. This invention achieves strong hardware-level isolation, real-time verification, and full traceability throughout the entire end-to-cloud chain, effectively preventing cross-tenant data leakage.

The invention discloses a block chain evidence storage method and device for electronic paper marking, and relates to the technical field of information technology and education, and the method comprises the steps: receiving a test paper scanning image of a test paper and an answer sheet scanning image of an answer sheet, extracting key feature points in the test paper scanning image and the answer sheet scanning image, and storing the key feature points in the test paper scanning image and the answer sheet scanning image; establishing a mapping relationship between the test paper and the answer sheet; encrypting the original data of the test paper and the answer sheet based on a Hash encryption algorithm to generate a unique identifier, and recording the scoring behavior of the answer sheet to obtain scoring process data; and detecting the scoring process data, when it is detected that the scoring process data is an abnormal paper marking behavior, triggering a block chain evidence storage mechanism, recording context information of the abnormal paper marking behavior, and generating an evidence storage record which cannot be tampered. By means of the mode, comprehensive behavior evidence storage in the paper marking process can be achieved, effective supervision and data non-tampering performance are achieved, and paper marking transparency and the intelligent level are improved.

The application discloses a product carbon mark management system and method based on a cloud platform, and relates to the field of environmental information management and green supply chain.The method comprises the following steps: collecting carbon emission data of each stage from the whole life cycle of a product, generating standardized emission data through nonlinear normalization; generating stage carbon synergy factors based on node collaborative analysis and sensitivity evaluation, and constructing a cross-enterprise carbon synergy matrix; calculating stage carbon impact factors and damping coefficients to generate comprehensive stage emission factors; calculating cumulative sensitivity accordingly to form a whole life cycle carbon footprint; identifying abnormal stages and dynamically correcting in combination with historical data to generate carbon mark stability; and finally generating a carbon mark and storing it through a blockchain to realize a cloud platform management closed loop.Through efficient collection and standardization of whole life cycle carbon emission data, multi-layer collaborative analysis and dynamic correction, and credible storage and management closed loop of the carbon mark, the accuracy, reliability and traceability of the product carbon mark are realized.

The invention discloses a method and equipment for realizing a front-end full stack through CellJS, a program product and a storage medium, and relates to the technical field of Web application development. The method comprises the following steps: defining a plurality of service interfaces, and generating a metadata file according to each service interface; when the back-end module is started, the back-end module loads the metadata file to obtain a data set containing mapping information of the service interface and the service method; constructing an authentication and authorization module according to the data set; generating a front-end client class corresponding to each service interface; when a user triggers a login operation on the front-end interface, the front-end module sends the login operation to the corresponding rear-end module, and generates an access token according to the authentication and authorization module and the front-end client class; when the front-end module initiates business service calling, the rear-end module performs permission verification according to the access token to obtain a verification result; and performing service processing according to a verification result, and returning a service processing result to the front-end module. By implementing the technical scheme provided by the invention, the development complexity of the full-stack application can be reduced.