• International Journal of Internet, Broadcasting and Communication
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• 제14권1호
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• pp.116-121
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• 2022

In this paper, we propose a highly secure watermarking technique in which the watermark is multi-encrypted using the R, G, and B component pixels of color image, and then the multi-encrypted watermark is hidden in the LSB of the color image pixel. According to the technique proposed in this paper, the quality of the stego-image created by hiding the multi-encrypted watermark in the LSB of the color image is so excellent that the difference from the cover image cannot be recognized. Also, it is possible to extract the original watermark from the stego-image without loss. If the watermark is hidden in the image using the proposed technique, the security of the watermark is maintained very well because the watermark hidden in the stego-image is multi-encrypted. The proposed watermarking technique can be used in the applications such as military and intellectual property protection requiring high security.

• 문화기술의 융합
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• 제7권4호
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• pp.863-867
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• 2021

본 논문에서는 컬러 영상의 LSB에 워터마크를 은닉하기 위하여 영상의 인접 픽셀들과 공간적 암호화 기법을 사용하여 보안성이 높은 컬러 영상 워터마킹 기법을 제안하였다. 본 논문에서 제안된 기법에 따라 컬러 영상의 LSB에 워터마크를 은닉하여 생성된 스테고 이미지의 화질은 원본 영상과 차이를 인지할 수 없을 정도로 매우 우수하고, 스테고 이미지로부터 원본 워터마크를 손실 없이 추출할 수 있다. 제안 기법을 사용하여 영상에 워터마크를 은닉하면 스테고 이미지에 은닉되어있는 워터마크는 다중으로 암호화되어있기 때문에 워터마크의 보안성이 매우 우수하게 유지된다. 제안된 워터마킹 기법은 높은 보안이 요구되는 군사, 지적 재산권 보호 등의 응용에 사용될 수 있다.

• Journal of Information Processing Systems
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• 제16권6호
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• pp.1391-1406
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• 2020

A zero-watermarking algorithm in transform domain based on RGB channel and voting strategy is proposed. The registration and identification of ownership have achieved copyright protection for color images. In the ownership registration, discrete wavelet transform (DWT), discrete cosine transform (DCT), and singular value decomposition (SVD) are used comprehensively because they have the characteristics of multi-resolution, energy concentration and stability, which is conducive to improving the robustness of the proposed algorithm. In order to take full advantage of the characteristics of the image, we use three channels of R, G, and B of a color image to construct three master shares, instead of using data from only one channel. Then, in order to improve security, the master share is superimposed with the copyright watermark encrypted by the owner's key to generate an ownership share. When the ownership is authenticated, copyright watermarks are extracted from the three channels of the disputed image. Then using voting decisions, the final copyright information is determined by comparing the extracted three watermarks bit by bit. Experimental results show that the proposed zero watermarking scheme is robust to conventional attacks such as JPEG compression, noise addition, filtering and tampering, and has higher stability in various common color images.