A novel algorithm for .NET programs watermarking based on obfuscation

This paper proposes a novel software watermarking based on obfuscation for .net programs´ security. At first, we utilize the integer factorization algorithm to divide intermediate language code into several blocks. Secondly, it uses dictionary-order algorithm to obfuscate the order of these blocks. Thirdly, we use the thought of zero-watermarking technology to embed watermark to prove the program´s copyright. Finally, we insert the unconditional branch instruction that preserve the program´s semantics. Experimental results demonstrate our method not only have efficient robustness, but also provide a feasible solution for the design of software-watermarking arithmetic in low-level programming language.