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Color image encryption based on one-time keys and robust chaotic maps. (English) Zbl 1198.94109
Summary: We designed a stream-cipher algorithm based on one-time keys and robust chaotic maps, in order to get high security and improve the dynamical degradation. We utilized the piecewise linear chaotic map as the generator of a pseudo-random key stream sequence. The initial conditions were generated by the true random number generators, the MD5 of the mouse positions. We applied the algorithm to encrypt the color image, and got the satisfactory level security by two measures: NPCR and UACI. When the collision of MD5 had been found, we combined the algorithm with the traditional cycle encryption to ensure higher security. The ciphered image is robust against noise, and makes known attack unfeasible. It is suitable for application in color image encryption.

94A60 Cryptography
37D45 Strange attractors, chaotic dynamics of systems with hyperbolic behavior
94A08 Image processing (compression, reconstruction, etc.) in information and communication theory
Full Text: DOI
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