Secure Watemarking Method with Smart Card

we treat in this paper a secure authentication method using watermarking, smart card and cryptography. It can serve to control logical and physical access and the network access and to prove the card owner identity.This method is very secure because the high level of security of smart card, the method of watermarking and detection and the complexity of the algorithm RSA and DES aim to remove the most known attacks. Keywords-component; Smart card, cryptography, RSA, symmetric and asymmetric algorithms, watermarking, detection, DCT, DCT inverse