An algorithm for encryption of secret images into meaningful images |
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Institution: | 1. College of Computer Science and Technology, Beijing University of Technology, Beijing 100124, China;2. State Key Laboratory of Information Security Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, China;3. Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China |
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Abstract: | Image encryption algorithms typically transform a plain image into a noise-like cipher image, whose appearance is an indication of encrypted content. Bao and Zhou Image encryption: Generating visually meaningful encrypted images, Information Sciences 324, 2015] propose encrypting the plain image into a visually meaningful cover image. This improves security by masking existence of encrypted content. Following their approach, we propose a lossless visually meaningful image encryption scheme which improves Bao and Zhou's algorithm by making the encrypted content, i.e. distortions to the cover image, more difficult to detect. Empirical results are presented to show high quality of the resulting images and high security of the proposed algorithm. Competence of the proposed scheme is further demonstrated by means of comparison with Bao and Zhou's scheme. |
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Keywords: | Image Encryption Steganography Chaos Cat Map Lifting Wavelet Transform |
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