Block chain transaction monitoring method and system based on static characteristics and dynamic instrumentation

Abstract

The invention discloses a block chain transaction monitoring method and system based on static characteristics and dynamic instrumentation, and the method and system reduce the detection false alarm rate of malicious transactions to the greatest extent through transaction data static semantic analysis and transaction replay dynamic execution detection, distinguish malicious transaction and normal transaction behaviors more accurately. The transmission behavior of sensitive data in the transaction is detected by intelligent contract virtual machine instrumentation and dynamic taint analysis methods; and meanwhile, a machine learning method is utilized, return results of malicious transaction behaviors and normal transaction behaviors detected by a system dynamic and static method are analyzed, and a final study and judgment stage is added, so that whether the transaction is the malicious transaction or not can be effectively judged. The invention can detect the transaction of the corresponding smart contract of the block chain, assists a machine learning algorithm to effectively improve the detection accuracy in a mode of combining static feature analysis and dynamic execution detection and analysis, and has a significant effect on improving the detection accuracy.

Description

technical field [0001] The invention relates to the technical field of computer security, in particular to a method and system for monitoring block chain transactions based on static features and dynamic instrumentation. Background technique [0002] With the further improvement of network informatization and the development of blockchain technology, the scale of the blockchain-based transaction market has expanded rapidly in recent years. At the same time, due to the lack of supervision of transactions and data on the chain, there are a large number of Malicious transactions threaten the security of smart contracts and user funds on the chain, causing immeasurable economic losses. [0003] One of the most important technical features of blockchain is smart contracts. Smart contracts are programs stored on the blockchain that assist and verify the negotiation and operation of contracts. Many blockchain platforms support the operation of smart contracts. Blockchain smart c...

AI Technical Summary

Problems solved by technology

At present, malicious transaction detection and research on classic vulnerabilities of smart contracts (integer overflow, reentrancy vulnerabilities, timestamp dependency vulnerabilities, etc.) are relatively rich, but it is impossible to detect some code logic vulnerabilities, and it is also impossible to detect flash loan vulnerabilities. , and the false positive rate of vulnerabilities generated by static analysis is relatively high

In addition, the current transaction monitoring and data analysis on the blockchain are only used to track the flow of assets, and rarely involve the monitoring of malicious transactions.

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