Applied cryptography (2nd ed.): protocols, algorithms, and source code in C
Applied cryptography (2nd ed.): protocols, algorithms, and source code in C
Conjugate Gradient Methods for Toeplitz Systems
SIAM Review
A new encryption algorithm for image cryptosystems
Journal of Systems and Software
Image Encryption Algorithm of Double Scrambling Based on ASCII Code of Matrix Element
CIS '07 Proceedings of the 2007 International Conference on Computational Intelligence and Security
A leak and its remedy in JPEG image encryption
International Journal of Computer Mathematics - Computer Vision and Pattern Recognition
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This paper presents a novel image encryption scheme based on Toeplitz matrix and Hankel matrix. According to the definition and the expression of Toeplitz matrix and Hankel matrix, we permutate the positions of image pixels to confuse the relationship between the plain-image and cipher-image, and construct a new key. To enhance security further, hyper-chaos system of Lü and Chen is taken to change the grey distribution of image pixels simultaneously. Numerical experimental results demonstrate that the key space is large enough, and the key is sensitive to initial conditions to resist the brute-force attack in the proposed scheme. Additionally, the distribution of grey values in encrypted image has a random-like behavior to resist statistical analysis. The proposed encryption scheme in this paper can suggest a high secure and efficient way for real-time image encryption and transmission in practice.