M. Nakano-Miyatake and H. Perez-Meana
Altheugh the principal application of the watermarking is copyright protection over the digital materials, it have been applied in other security fields, such as authentication, tamper proofing, etc. Generally the watermarking used for authentication, or tamper proofing is a fragile digital watermark. In this paper, we proposed an Identification (ID) card authentication system using robust watermarking technique, in which the embedded watermark must be survived to A/D and D/A conversion, and also the embedded watermark must be detected obliviously without ambiguity. The simulation results show the desirable performance of the proposed system.