International Journal of Network Security
Two Dimensional (2D) barcode has improved the information encoded capacity and it also has enriched the applications of barcode technique. Recently, there are researches dealing with watermark technique on 2D bar-code to prevent it from counterfeited or prepensely tampered. The existent methods still have to limit the size of embedded watermark in a relatively small portion. Furthermore, it also needs to utilize original watermark or other auxiliary verification mechanism to achieve the bar-code verification. In this paper, the authors propose a method called associative watermarking which is conducted by the concept of Association Rules (ARs) and the idea of Vector Quantization (VQ).