8results about How to "Ensure transaction security" patented technology

The invention discloses a training method and system for an abnormal transaction recognition model of an e-commerce platform, and particularly relates to the field of e-commerce. According to the method, multi-source transaction data are integrated, the accuracy of labeling is judged through cross validation, data labeling is divided into accurate labeling and inaccurate labeling, and after the inaccurate labeling is recognized, the similarity between prediction and an actual result is calculated and the performance stability of a model is evaluated by analyzing the sample proportion fluctuation condition of the model influenced by labeling errors; according to an evaluation result, the models are divided into a stable performance type and an unstable performance type, and different training strategies are adopted: for the stable performance model, the labeled data set is continuously used for training; and for the model with unstable performance, training is carried out in stages, pre-training is carried out by using accurate annotation data, then inaccurate annotation data is introduced, and optimization adjustment is carried out through an adaptive learning algorithm, so that the negative influence of annotation deviation on the model is effectively reduced, and the accuracy of the model in practical application is improved.

The invention discloses a computer network security transaction optimization system, and belongs to the technical field of network transaction security. The system comprises an identity verification authorization module, a transaction request processing module, a security monitoring protection module, a transaction intelligent optimization module, a transaction auditing management module and a transaction report analysis module, protection is enhanced by analyzing a user behavior mode, additional verification is triggered when abnormality is detected, the risks of identity false use and fraud are reduced, and the safety of the transaction is improved. Network traffic is monitored in real time, potential attack behaviors are identified and blocked, through transaction request checking and dynamic request scheduling strict auditing, node loads are monitored in real time, transaction requests are intelligently scheduled, system overload or bottleneck is avoided, standby nodes are automatically started, stable operation under the high concurrency condition is guaranteed, and the system reliability is improved. The method enhances the adaptation to the increase of the transaction flow and the change of the network environment, improves the security, efficiency and transparency of the transaction through the transaction audit management and report analysis, and guarantees the stability and compliance of the financial transaction environment.

The application discloses a blockchain transaction processing method and device, a storage medium and a product. The method comprises the following steps: in a transaction execution stage, a business function parameter of a target business contract is transmitted to a built-in supervision contract by calling a common transaction; at least one extended supervision contract is called according to the business function parameter by the built-in supervision contract, wherein the built-in supervision contract is a pre-compiled contract integrated in a source code of a bottom layer node of a blockchain; the process of calling the target business contract by the common transaction is supervised and reviewed by the at least one extended supervision contract, and a review result is obtained; and the common transaction is processed according to the review result, so that abnormal behaviors or illegal behaviors occurring in the transaction can be timely blocked.

This invention discloses a smart contract execution method in data asset transactions, belonging to the field of smart contract execution technology. The method includes: based on multiple transaction nodes triggered during smart contract execution, a reputation value is obtained based on the historical transaction execution of each transaction node for hierarchical selection, resulting in a verification layer and an execution layer, each containing multiple transaction nodes; based on each transaction node in the verification layer, signature validity verification is performed, and the validity verification pass rate is compared with a first threshold; in response to a validity verification pass rate greater than or equal to the first threshold, based on the multiple transaction nodes in the execution layer, some transaction nodes are selected for cross-validation, and the cross-validation pass rate is compared with a second threshold; if the cross-validation pass rate is less than the second threshold, cross-validation is performed on all transaction nodes in the execution layer for transaction execution judgment; if the cross-validation pass rate is greater than or equal to the second threshold, the transaction is executed.

The invention relates to a transaction security management method and device, computer equipment, a storage medium and a product, and relates to the technical field of security management. The method comprises the steps of sending a verification request to an intelligent contract under the condition that transaction information of a target transaction operation is received; the verification request is used for indicating that the transaction information is matched with a secure transaction record of a guarded user; when the matching result indicates that the matching fails and a transaction confirmation operation of the guarding user is received, constructing record updating data based on a first hash value corresponding to a locally stored first record updating frequency and the transaction information; sending a record updating request containing record updating data to the smart contract, so that the smart contract updates the secure transaction record of the guarded user based on the transaction information under the condition that the smart contract determines that the first hash value is matched with the second hash value; through the method, the accuracy of transaction operation protection based on the secure transaction record can be guaranteed, and the transaction security of the guarded user is guaranteed.

The application discloses a kind of intelligent contract execution methods in data asset transaction, belong to intelligent contract execution technical field, comprising: according to the multiple transaction nodes triggered when intelligent contract execution, according to the credit value of each transaction node historical transaction execution judgment, to carry out hierarchical selection, obtain verification layer and execution layer, verification layer and execution layer all include multiple transaction nodes;Based on each transaction node of verification layer, the legality verification of signature is executed, and the legality verification pass rate is compared with the first threshold value;In response to the legality verification pass rate greater than or equal to the first threshold value, based on the multiple transaction nodes of execution layer, extract part of transaction node to execute cross-validation, and the cross-validation pass rate is compared with the second threshold value;If cross-validation pass rate is less than the second threshold value, then based on the cross-validation of all transaction nodes of execution layer, for transaction execution judgment;If cross-validation pass rate is greater than or equal to the second threshold value, then transaction execution.

The present invention relates to the technical field of blockchain, and discloses a refund method, system and computer-readable storage medium based on blockchain. A payee SPV wallet sends a payment template to a payee SPV wallet; the payee SPV wallet fills UTXO as a transaction input into the payment template and signs it to generate a first transaction, and at the same time sets the status of UTXO to used; the payee SPV wallet verifies the first transaction, and if the verification fails, constructs a second transaction based on the first transaction, and sends the first transaction and the second transaction to the payee SPV wallet; the payee SPV wallet broadcasts the first transaction and the second transaction to all nodes, determines the payment and refund status, and adjusts the transaction input of the first transaction or the transaction output status of the second transaction. When the payment is successful but the refund is unsuccessful, the signature part in the second transaction is stored. The present invention can complete the transaction refund while preventing the payee from double-spending, and retains the payee's signature when the refund is unsuccessful, thereby ensuring the refund safety.

This application relates to the technical field of coin authentication, and in particular to an automated method and system for coin authenticity authentication based on multispectral image fusion. The method determines the type information of the coin to be authenticated, and moves the coin to be authenticated to either a banknote authentication position or a coin authentication position based on the type information. For the banknote authentication position, multispectral image detection and microscopic feature detection are performed to generate authenticity information. For the banknote authentication position, creases and moisture spots are identified to generate condition information. For the coin authentication position, alloy composition and patina elements are detected to determine authenticity information. For the coin authentication position, data acquisition and model construction of the three-dimensional morphology are performed to obtain condition information.