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TDCM: An IP watermarking algorithm based on two dimensional chaotic mapping

With the rapid development of VLSI (Very Large Scale Integration) circuit, IP 
 (Intellectual Property) protection for reused technology is widely 
 concerned. A watermarking scheme for IP protection is proposed on basis of a 
 two dimensional chaotic mapping model (TDCM). The scheme utilizes a secure 
 and controllable embedding model to compute the aggregation level of 
 physical resource positions and the secure threshold of controllability. A 
 two dimensional chaotic sequence is generated with the control of secure 
 threshold. The first dimensional sequence is used to determine random 
 watermark positions and the second dimensional sequence is to control 
 watermark number in each position. Finally, the watermarks are inserted into 
 corresponding places orderly. The experiments show that the proposed scheme 
 has low resource overhead by comparing with other schemes. The resistance to 
 attacks and robustness of the watermark are encouraging as well.