Robust Image Authentication Method Combing SVD and PKI
奇异值分解与PKI结合的鲁棒图像认证方法

The goal of image authentication is to verify the integrity of an image by discovering malicious manipulations. Small modifications such as lossy compression and noises do not affect the results of image authentication, whereas modifications that do modify the visual content make the altered image unauthentic. This is the main requirement for image authentication. In ths paper, we propose a robust authentication method combing singular value decomposition CSVD)and public key infrastructure (PKI). This proposed method uses SVD as basic means to extract invariable, compression-tolerant features of image block, and PKI as the way to exchange keys. Experiment results show that our method can verify the authenticity and the integrity of picture. Furthermore, the proposed method has more robust ability distinguishing compression and Gaussian noise from deliberate tampering than several other methods,which is presented in the compare test results.