3results about How to "Guaranteed non-repudiation" patented technology

The invention discloses a multi-level access control and crowd search method and system based on trusted hardware, and relates to the technical field of energy power. According to the invention, a multi-level access control mechanism based on trusted hardware is constructed, so that authority isolation between different levels of data such as power generation, power transmission and power utilization and personnel is realized, and unauthorized access to core power data is prevented; the security of a query mode and an access mode is protected through a hidden search technology, and an attacker is prevented from deducing sensitive information such as a power grid operation state and load characteristics by analyzing search behaviors; dynamic authority management is used for blocking the search authority of revoked personnel to the data of the power monitoring system, so that the non-repudiation of data operation and the anonymity of user identity are ensured; mode leakage in a storage access process is eliminated through an ORAM mechanism, a cloud malicious agent is prevented from obtaining key data flow tracks such as a power equipment state and a fault record through flow analysis, and the data protection strength and the privacy guarantee capability of the energy power cloud storage system are comprehensively improved.

This invention discloses an end-to-end verification method, system, and product for video streams based on Schnorr signatures. The sending end first encodes the audio and video streams into a continuous sequence. For each encoded transmission packet, a point in the group is calculated using random numbers as the random commitment point for the frame signature, where is the generator of the selected elliptic curve group, and the group order is a prime number. Then, a signature scalar is calculated according to the Schnorr signature algorithm. Next, the original video frame data, the random point, and the signature scalar are combined into an authentication data packet, which is pushed to the server and client in real time via a network protocol. Finally, the client performs instant authentication and cache management, while the server performs frame-by-frame verification and aggregated storage. This invention utilizes the linear aggregation characteristics of Schnorr signatures to achieve efficient authentication and traceability of real-time video streams and historical stored data while significantly reducing storage space requirements, ensuring the integrity and evidentiary value of the video data.

The invention discloses a cross-border e-commerce multi-country data collaborative management method and system, and belongs to the field of computer network and data processing, and the method comprises the steps: obtaining local original e-commerce service data by each edge node, and obtaining a standardized feature vector; each edge node uses the standardized feature vector to train a local model, generates a model parameter update package indicating a model optimization direction, executes privacy protection processing including differential privacy noise injection on the model parameter update package, and sends the model parameter update package to a collaborative management center server; the collaborative management center server receives the model parameter updating packages from the multiple edge nodes, calculates an adaptive aggregation weight coefficient, and executes weighted aggregation to update a global collaborative model; and the collaborative management center server predicts the commodity demand quantity of the future time domain based on the updated global collaborative model, and generates a deterministic service scheduling instruction. According to the invention, the total cost of cross-border logistics is reduced, and the inventory turnover rate is improved.