基于数字水印的电子印章系统研究与实现

Electronic seal system based on digital watermark and its implementation

印章图像在实际商业交往中的应用很广泛,为确保其在印章域中的安全性,需要考虑一种新的基于印章域数字水印的防伪机制,并且对于打印扫描过程具有强鲁棒性。提出了一种在印章图像中嵌入数字水印以达到防伪目的的新思路,针对传统印章的易伪造弊端,通过将密码签名原理和数字水印技术应用于电子印章之中,并结合COM组件技术实现了机密文档的防篡改功能,身份认证功能及不可否认性功能。

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.