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This paper aims at protecting copyrights in multicast communication. Multicast communication can be provided either at the network layer (example is the IP multicast) or at the application layer (also called overlay multicast). This work focuses on overlay multicast. A main feature of overlay multicast is that end systems (rather than network routers) take over the responsibilities of delivering the...
In this paper, a digital watermarking technique for copyright protection or ownership identification of digital media is introduced. In the proposed scheme, a novel classifier is employed to measure the visual activity of the image blocks. The proposed approach utilizes the level of visual activity within the host image and modifies the intensities of some pixels in image blocks accordingly. The described...
Digital image watermarking is an emerging copyright protection technology. It aims at asserting intellectual property rights of digital images by inserting a copyright identifier in the contents of the image, without sacrificing its quality. In this paper, we propose an imperceptible and a robust digital image watermarking algorithm. The algorithm is based on combining two powerful transform domain...
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