Coin-mixing service analysis method based on heuristic transaction analysis

A coin-mixing service analysis method based on heuristic transaction analysis, wherein the coin-mixing service analysis method comprises:

• S1, selecting a target service to be analyzed;
• S2, firstly, performing security analysis on the target service, and determining whether an API provided thereby contains vulnerability;
• if the API of the target service contains vulnerability, then obtaining sample transactions directly by means of the API containing the vulnerability;
• if the API of the target service contains no vulnerability, then obtaining sample transactions by using a small amount of Bitcoin for interaction with the service;
• each of the sample transactions comprising an input into the service and output from the service, and an original corresponding relationship between the input into the service and output from the service;
• S3, using a heuristic transaction analysis method and determination standard to analyze the target service and the sample transactions thereof, and determine a service category to which the target service belongs, wherein the service category comprises two categories, one being an switched coin-mixing service, that is, using an output chain as a core coin-mixing process of the service, and the other one being an obfuscated coin-mixing service, that is, using single centralized output transaction and an anonymous set as a core coin-mixing process of the service;
• and
• S4, for an obfuscated coin-mixing service, by means of a heuristic method, further using structural defects contained in transactions generated by the coin-mixing service to identify all coin-mixing transactions of the obfuscated coin-mixing service.