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Ergodic matrix and hybrid-key based image cryptosystem

Ergodic matrix and hybrid-key based image cryptosystem

Zhou, Xiaoyi, Ma, Jixin, Du, Wencai and Zhao, Yongzhe (2011) Ergodic matrix and hybrid-key based image cryptosystem. International Journal of Image, Graphics and Signal Processing (IJIGSP), 3 (4). pp. 1-9. ISSN 2074-9074 (Print), 2074-9082 (Online) (doi:

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The existing traditional cryptosystems, such as RSA, DES, IDEA, SAFER and FEAL, are not ideal for image encryption because of their slow speed and ineffectiveness in removing the correlations of the adjacent pixels. Meanwhile chaos-based cryptosystems, which have been extensively used over the past two decades, are almost all based on symmetric cryptography. Symmetric cryptography is much faster than asymmetric ciphers, but the requirements for key exchange make them hard to use. To remedy this imperfection, a hybrid-key based image encryption and authentication scheme is proposed in this paper. In particular, ergodic matrices are utilized not only as public keys throughout the encryption/decryption process, but also as essential parameters in the confusion and diffusion stages. The experimental results, statistical analysis and sensitivity-based tests confirm that, compared to the existing chaos-based cryptosystems, the proposed image encryption scheme provides a more secure means of image encryption and transmission.

Item Type: Article
Additional Information: [1] First published: June 2011. [2] Published as: International Journal of Image, Graphics and Signal Processing, (2011), Vol.3, (4), pp. 1-9.
Uncontrolled Keywords: hybrid-key, ergodic matrix, symmetric, asymmetric, entropy, diffusion
Subjects: Q Science > QA Mathematics > QA76 Computer software
Pre-2014 Departments: School of Computing & Mathematical Sciences
Related URLs:
Last Modified: 14 Oct 2016 09:17

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