Abstract
We investigate the dynamic watermarking scheme for quantum images using quantum wavelet transform (QWT) proposed by Song et al. (Quantum Inf Process 12(12):3689–3706, 2013). It is aimed to embed the watermark image into the wavelet coefficients of the quantum carrier image. However, in our opinion, the key procedures of the protocol are wrong. At last, a possible improvement strategy is presented.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (Grant No. 61003290); Beijing Natural Science Foundation (Grant No. 4122008); and Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality (No. CIT&TCD201304039). National Cipher Development Fund during the 12th Five-Year Plan Period (No. MMJJ201401006).
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This comment refers to the article available at doi:10.1007/s11128-013-0629-2.
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Yang, YG., Xu, P., Tian, J. et al. Analysis and improvement of the dynamic watermarking scheme for quantum images using quantum wavelet transform. Quantum Inf Process 13, 1931–1936 (2014). https://doi.org/10.1007/s11128-014-0783-1
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DOI: https://doi.org/10.1007/s11128-014-0783-1