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29 June 2001 Digital image protection by means of cryptographic mixing transformations
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Proceedings Volume 4430, ROMOPTO 2000: Sixth Conference on Optics; (2001) https://doi.org/10.1117/12.432892
Event: ROMOPTO 2000: Sixth Conference on Optics, 2000, Bucharest, Romania
Abstract
A lot of research studies have been devoted to image protection, either by cryptographic methods (e.g. Opt. Eng. 35, Sept. 1996) or by watermarking techniques (e.g. Proc. SPIE Vol. 3971). In a previous study, the authors reconsidered and improved the cryptographic mixing transformations proposed by CE Shannon for natural language, obtaining a strong cipher for images, as well. The present paper goes deeply inside of the image protection problem: (1) by presenting some variants for the cryptographic mixing transformations which are good even when burst errors appear in the cryptogram; (2) by enabling the use of an m-gram substitution in the mixing functions; (3) by advancing a bridge between cryptographic methods and watermarking techniques. The illustrations are obtained out of processing: (a) computer-simulated random images obeying different probability laws and autocorrelation functions, (b) natural images, and (c) test images.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Adriana Vlad and Mihai Petru Mitrea "Digital image protection by means of cryptographic mixing transformations", Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); https://doi.org/10.1117/12.432892
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