Embedding and extraction method of software watermark

Abstract

The invention discloses an embedding and extracting method for a software watermark. When the watermark is embedded, corresponding watermark codes are generated according to an even flow triggered by a user and watermark information to be embedded, and are embedded into assembly code sections corresponding to all events. Through establishing a logical dependency relation between the watermark and a program, the concealing performance of the watermark information can be improved. By the adoption of the embedding and extracting method, Android platform application software can be effectively protected.

Description

technical field [0001] The invention relates to computer software security technology, in particular to a software watermark embedding and extraction method. Background technique [0002] Currently, with the rapid development of Android mobile smart terminals, an emerging economic model has emerged around mobile applications in recent years. However, app repackaging poses a huge risk to app developers, app stores, and users. Malicious users can destroy developers' revenue sources and infringe their intellectual property rights through application repackaging. Recent research has shown that app repackaging is one of the most common mechanisms by which Android malware spreads externally. The survey also revealed that app repackaging was a serious vulnerability in mobile banking apps. In the face of these security threats, application software needs to be protected. [0003] At present, a lot of research has been done in the field of software protection at home and abroad, ...

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Problems solved by technology

For example, rewrite it into a single letter, or a short combination of meaningless letters, or even rewrite it into a symbol like "__", so that readers cannot guess its purpose based on the name

[0007] (2) Rewrite part of the logic in the code and turn it into a functionally equivalent but harder to understand form

Since the Android platform uses the dalvik virtual machine to run the Android program, and the dalvik virtual machine runs the dalvik bytecode, the dalvik bytecode has instruction characteristics different from the assembly instruction, so the existing software based on assembly instructions such as x86 Watermark technology cannot be directly applied to Android-based Dalvik bytecode instructions

[0020] It can be seen that the current software protection methods are not suitable for the protection of Android platform application software.

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