Research on algorithm recognition based on characteristic expression

This paper focuses on methods and policies about algorithm recognition, which is turned to recognizing characteristic expression picked up as the distinguishable characteristics, in high-level language that is gained by code reverse analysis. With an eye to the expression in the high level language recovered, this paper researches methods to recognize algorithm based on abstract syntax tree, and proposes two different policies, which are strict compatibility and anamorphic compatibility, to recognize characteristics expression aiming at recognizing algorithm in the target code, which is of great help to code analysis.