Research and Implementation of Software Watermark Based on Expanded Threshold
Hanling Zhang · Jisuanji gongcheng · 2011
Asmuth-Bloom(AB) algorithm is a robust software watermark algorithm based on threshold scheme,which is originally used to secret sharing,so there is no restriction on sub-key's length.With an expanded threshold scheme,sub-key's length can be reduced.A new algorithm based on expanded threshold is proposed.Moreover,a new watermarking system is implemented on the Java platform by using dynamic graph.Experimental results show that the proposed method can reduce the data expansion,and make the recovery process easier.The conditions above mentioned are suitable for practicalized watermark system.