Robust Image and Video Data Hiding Using Secure Watermark Detection

We propose a framework where the target image/multimedia data is possessed by the image holder only. A compressive sensing matrix is issued by a certificate authority (CA) server to the image holder in the form of key. The image holder transforms the images into DCT Coefficient matrix embeds the watermark image and then sends it to the server for watermark detection. The server detect the watermark and authenticates the owner of the multimedia data. On successful authentication the server uploads the watermarked image to the cloud. Our system is secure under the semi-honest assumption that all parties comply with the protocol's procedure strictly, and none of them will actively withdraw midway or incorporate false or malicious data. No two parties will collude to attack a third one. But during the computing process, they may try to keep all the intermediate information, so that they can infer others' input after the process.