3results about How to "Improve transaction security" patented technology

This disclosure provides a method, apparatus, electronic device, and readable medium for verifying the consistency of contract credentials. The method includes: acquiring contract credentials generated by a smart contract operation and management system within the current time window; grouping the contract credentials according to their corresponding contract instances, sorting the contract credentials within each group, and calculating the hash value of each contract credential; constructing a Merkle tree for each contract instance using a predetermined number of branching tree structures and calculating the current verification Merkle root; acquiring the current baseline Merkle root sent by the smart contract operation and management system for that contract instance; and comparing the current verification Merkle root with the current baseline Merkle root to verify the consistency of the contract credentials. This disclosure enables consistency verification of contract credentials among various entities in a centralized system, thereby ensuring the traceability and immutability of transactions and improving transaction security.

This application discloses an order management system and method for a fully automated beer vending machine. The system includes: a user terminal, used to respond to a user's order for beer, generate an order request, and send it to a server; a server, used to generate a preparation request or a first pickup code based on the pickup method information after the user's identity verification and payment verification are passed, and send the preparation request or the first pickup code to the beer vending machine; and a beer vending machine, used to sequentially perform beer bottling and door opening operations after the preparation request is verified; or, after the first pickup code is verified, receiving a second pickup code input by the target user terminal, and when the second pickup code matches the first pickup code, sequentially performing beer bottling and door opening operations. This system decouples the time of user ordering and pickup to improve convenience while ensuring that the beer is freshly prepared before pickup to guarantee quality.

The application discloses an inter-provincial spot transaction carbon footprint tracking method, system and device based on a blockchain, and belongs to the technical field of electric power. The carbon footprint tracking method comprises the following steps: collecting inter-provincial electric power spot market cross-provincial electric power transaction results through a blockchain, and storing the results in the proxy accounts of each power generation province and power purchase province in a blockchain business; combining the inter-provincial electric power spot market clearing results, modeling carbon emission allocation of inter-provincial electric power spot transactions, and obtaining a carbon emission allocation coefficient; according to the proxy account information of each power generation province and power purchase province, the inter-provincial electric power spot market clearing results and the carbon emission allocation coefficient, evaluating the whole process of carbon production, carbon transfer and carbon allocation through a smart contract, and recording the whole process in the blockchain; and according to the results recorded by the smart contract, forming unalterable carbon footprint information in the blockchain through a chain structure.