Abstract
In this paper, a symmetric synchronous stream encryption technique is suggested. The proposed technique utilizes a selected block from the parity bit plane of a public image as a nonlinear function to confuse the relation between the ciphered bits and the key stream. Using the proposed technique, any sort of message like text or image can be encrypted as well as decrypted bit by bit. Simulation results showed that ciphered gray scale images have flat histogram with entropy almost equal to eight and a correlation between pixels in all directions which is almost equal to zero. The technique is highly sensitive to any change in the starting pixel of the selected block or the initial condition of the pseudo-random generator.








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Ullagaddi, V., Hassan, F. & Devabhaktuni, V. Symmetric synchronous stream encryption using images. SIViP 9, 1–8 (2015). https://doi.org/10.1007/s11760-012-0416-z
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DOI: https://doi.org/10.1007/s11760-012-0416-z