MULTI-WATERMARKING SCHEME FOR GROUP USERS BASED ON VISUAL CRYPTOGRAPHY  

作　　者：YuanZhonglan XiaGuangsheng WenQiaoyan YangYixian 

机构地区：[1]P.O.Box126,BeijingUniversityofPostsandTelecommunications,Beijing100876,China [3]StateKeyLaboratoryofIntegratedServicesNetwork,XidianUniversity,Xi＇an710071,China

出　　处：《Journal of Electronics(China)》2005年第4期364-370,共7页电子科学学刊（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.90204017, 60373059)National 973 Project (G1999035805) ISN Open Foundation

摘　　要：All watermarks are shared into shadow images using VCS(Visual Cryptography Scheme). Only one specific shadow (as a new watermark) is embedded into the host signal and the other ones are distributed to every user in each group as a key. In the watermarking extraction procedure, users in different group can obtain different watermark by combining their shadows with the extracted one from the watermarked signal. Analysis and experimental results show that the new watermarking method is novel, secure and robust.All watermarks are shared into shadow images using VCS(Visual Cryptography Scheme). Only one specific shadow (as a new watermark) is embedded into the host signal and the other ones are distributed to every user in each group as a key. In the watermarking extraction procedure, users in different group can obtain different watermark by combining their shadows with the extracted one from the watermarked signal. Analysis and experimental results show that the new watermarking method is novel, secure and robust.

关 键 词：Digital watermarking Visual cryptography Multi-watermarking 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]