Electronic seal system based on digital watermark and its implementation
Junmin Zhang · Jisuanji gongcheng yu sheji · 2007
As signature image is widely applied in actual business activities,to make sure their security in analog form,we need to develop a new method based on digital watermarking against counterfeit in signature image,which is strongly robust for print-and scan process.A new watermarking scheme against counterfeit for signature image is proposed.In order to avoid forgery problem used in the traditional seal the electronic seal embedded with cipher signature and digital water-mark are brought forward.The COM groupware is combined to prevent the secret document from the illegal modification and the function of identity authentication and non-repudiation is realized.