Algorithm to Incorporate Non-invertibility in Watermarking
Robustness, even if recognized as a key property of the digitalwatermarking, is not considered enough to prove the ownership of the image. The aim of inversion attacks is to create ambiguities about the authorship of an image. To thwart inversion attacks with otherwise robustwatermarking schemes, non-invertibility of watermarking has often been stressed.
We have in this paper, by using the digital signature algorithm (DSA), proposed a new way of incorporating non-invertibility into digitalwatermarking schemes, especially the private digital watermarkingschemes. What we propose in this paper is not only just a newwatermarking technique but also a provably secure, non-invertible scheme that has features like time-stamping and use of asymmetric keys, all this vouchsafed by the underlying use of digital signature algorithm (DSA) which is a well known standard in cryptography.
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