Dynamic map based on PPCT structure software watermark protection

With the rapid development of software industry, software security is facing a severe test. Dynamic map watermarking is a relatively new technique of dynamic software watermark. On the basis of this theory, this paper proposed tamper resistant watermarking algorithm, based on PPCT hybrid coding structure under multiple constant. The algorithm uses the internal structure of the watermark graph constants for encoding data to achieve watermark anti-tampering by creating one or more sub-procedures´ functional dependency on the host program, on the real play of the tamper-resistant watermark effect to increase the difficulty of attackers, which can effectively protect the watermark.