The Code Obfuscation Technology Based on Class Combination

Along with the development of the Internet and distributed systems, it requires that the software is irrelative with the runtime platform, and can be transplanted. Meanwhile how to protect mobile code from malicious host is a new issue that cannot be dealt by traditional technologies. Under this condition, the Java appears. However the JVM instruction system is too simple, but its class format includes a lot of information which is useful for the anti-compiling. The obfuscation can prevent the java program from reverse-engineering effectively, and source codes which de-compiler got cannot read easily. This paper discusses the method of the combined class of code obfuscation; and simultaneously the definition, classification and standard judgment of the Obfuscation technology are given.