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1 Research on information embedding and particularly information hiding techniques has received considerable attention within the last years due to its potential application in multimedia security. Digital watermarking, which is an information hiding technique where the embedded information is robust against malicious or accidental attacks , might offer new(More)
Digital watermarks are signals embedded in multimedia data to allow copyright enforcement. In most watermarking schemes the embedded signal must be known for watermark detection, which leads to severe security risks. Van Schyndel et al. proposed a public watermark detection principle that works without explicit reference to the embedded signal. In this(More)
Digital watermarking is the process of introducing small modifications into a copy of a digital document that can be detected later. The embedded information can be used to determine the document's owner or simply to distinguish several copies. However, coin-cidental or malicious " attacks " can degrade the robustness of watermark detection. Here, uniform(More)
Unauthorized copying and distribution of digital data is a severe problem in protecting intellectual property rights. The embedding of digital watermarks into multimedia content has been proposed to tackle this problem, and many different schemes have been presented in the last years. However, almost all of them are symmetric, meaning the key used for(More)
Recently it was shown that, in some situations, blind watermarking can perform as well as watermarking schemes with the host signal available to the decoder. In this paper, blind watermarking of colored Gaussian host signals in the presence of filtering and additive Gaussian noise attacks is discussed. Three suboptimal but practical schemes are compared(More)
One envisioned application of digital watermarking is fingerprinting, in which different information is embedded into several copies of the same original signal. Several attackers may collude by combining their copies to produce an attacked signal. In the case of independent watermarks, a collusion-attack model is presented and shown to be analogous to the(More)
— Digital watermarking is a technology which potentially can be used to enforce the copyrights and integrity of digital multimedia data. In this paper, a communications perspective on digital watermark-ing is used to compute upper performance limits on blind digital watermarking for simple AWGN attacks and attacks by amplitude scaling and additive white(More)
New blind digital watermarking schemes that are optimized for additive white Gaussian noise (AWGN) attacks have been developed by several research groups within the last two years. Currently, the most ef£cient schemes, e.g., the scalar Costa scheme (SCS), involve scalar quantization of the host signal during watermarking embedding and watermark reception.(More)