A Technique for Detecting the Substitution of a Java-Module of an Information System Prone to Pharming with Using a Hidden Embedding of a Digital Watermark Resistant to Decompilation

The relevance of the problem under study is due to the rapid development of the java programming language, a large number of commercial applications written in this programming language. The purpose of the article is to develop a methodology that allows you to determine the java-module of the information system, which does not contain a hidden digital watermark. It is necessary that the digital watermark is not damaged during the decompilation of the entire system in order to replace the java module, and that the class files and the entire information system function unchanged. Thus, at first, a digital watermark is hidden in all java-modules of the information system. Next, we check the resistance of the digital watermark to decompilation attacks with block substitution. The materials of the article can be useful in the implementation of hidden embedding of a digital watermark in the class files of a large java module.