An algorithm based on double-fragile digital watermarking of Distance Education´s electronic seal

The e1ectronic documents of Distance Education Certificate need to embed the electronic seal. In order to ensure that the electronic seal can not be copied and it has non-repudiation of the signature process and uniqueness of signed certificate, the paper proposes a new electronic seal anti-counterfeit algorithm based on double-fragile digital watermarking. The algorithm uses the program that is embedding the double-fragile digital watermarking into the electronic seal and electronic document to obtain the mixed image. The program protects the electronic seal image through embedding the anti-counterfeit tag watermarking and guarantees the legitimacy and authenticity of the document through the document feature watermarking.