An Approach to Anti-counterfeit of Identity Document Based on Digital Watermarking and Digital Signature

The anti-counterfeiting methods and implementation for certificates based on digital watermarking and digital signature technique are described in the paper. The lower frequency components are extracted as main feature information. After facial image on the certificates being transformed using DWT and DCT. Then this information as well as the owner´s identities data signed are combined in the original images at photos. The experiment result shows this proposed method is a more promising certificate anti-counterfeiting technology.