Operation method and device for obfuscated code

Abstract

The invention provides a running method and device of obfuscated code. The method includes: calculating all values of a parameter in a preset operation function and operation results of known numerical values in the preset operation function; storing all the values of the parameter and the corresponding operation results to a newly created data table; receiving target input of running the preset operation function, wherein the target input includes a target value of the parameter; and in response to the target input, finding a target operation result, which corresponds to the target value, inthe data table, and outputting the target operation result. According to the method, all the values of the parameter in the preset operation function and the operation results of all the values and the known values are stored into the data table, thus the target operation result corresponding to the target value of the parameter can be found through a manner of directly querying the data table when the preset operation function is run, code logic of the preset operation function can be completely hidden through the manner of querying the data table, cracking difficulty of the obfuscated code is increased, and code security is improved.

Description

technical field [0001] The invention relates to the technical field of code encryption, in particular to an operation method and device for obfuscating codes. Background technique [0002] In order to improve code security and prevent important logic codes from being cracked, a code obfuscation scheme is proposed. When the current code obfuscation tools obfuscate a single instruction, the usual way is to use multiple instructions that can cancel each other to superimpose the code obfuscation. For example, f(x)=x+2 is confused as f(x)=x-(-2); for another example, a=b+c is confused as: r=rand(), indicating that r is a random number; a =b+r; a=a+c; a=a-r. [0003] Although the existing code obfuscation scheme is easy to implement, the decompiler can use the compiler to optimize the code to restore the obfuscated code to the original code, making the obfuscated code less secure and easy to be crack. Contents of the invention [0004] The present invention provides an opera...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an operation method and device for obfuscating codes, so as to solve the problems of low difficulty in cracking codes after obfuscation and poor code security existing in code obfuscation schemes in related technologies

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