Abstract
In the process of network transmission, medical images are maliciously attacked to cause the loss of diagnostic data or the leakage of patient privacy. To solve this problem, this paper proposes a robust watermarking algorithm for encrypted medical images based on PHTs-DCT. First, use DWT-DCT and tent chaotic sequence to encrypt the medical image, which increases the security of the carrier medical image information. Then, PHTs-DCT transform is performed on the encrypted medical image to extract the feature vector. Finally, using the homomorphism of the encryption algorithm, combined with the concept of a third party, the zero-watermarking technology is used to embed and extract the watermark of the encrypted medical image. Experiments based on the MATLAB simulation platform, a large number of experimental results show that the proposed algorithm has good robustness to conventional attacks, and geometric attacks, especially in scaling, compression and translation attacks.
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Acknowledgements
 This work was supported in part by the Natural Science Foundation of China under Grant 62063004 and 61762033, in part by the Hainan Provincial Natural Science Foundation of China under Grant 2019RC018 and 619QN246, by the Postdoctoral Science Foundation under Grant 2020TQ0293, by the Science and Technology Research Project of Chongqing Education Commission Under Grant KJQN201800442, and by the General Project of Chongqing Natural Science Foundation Under Grant cstc2020jcyj-msxmX0422).
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Yi, D. et al. (2021). A Robust Zero-Watermarkinging Algorithm Based on PHTs-DCT for Medical Images in the Encrypted Domain. In: Chen, YW., Tanaka, S., Howlett, R.J., Jain, L.C. (eds) Innovation in Medicine and Healthcare. Smart Innovation, Systems and Technologies, vol 242. Springer, Singapore. https://doi.org/10.1007/978-981-16-3013-2_9
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DOI: https://doi.org/10.1007/978-981-16-3013-2_9
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