Image encryption plays one of the important roles in the field of information security. A new encryption scheme for color image based on quaternion rotation theory is proposed. The detailed definition and diagram of quaternion rotation are also given. The encryption scheme succeeds in getting the three color components of color image as a whole, and treating the encryption operation simultaneously. Original image is firstly decomposed into two of the same size of sub images, and then converted into pure quaternion representation of matrix. By using the property named quaternion rotation transformation, we can obtain a large amount of secret keys from iterations of the given initial secret key. Finally through an iterative loop system, the encryption is realized. The experimental results show that the encryption scheme can achieve great effect, strong security, and faster encryption and decryption speed.
HU Man, LÜ Dong-hui, REN Yan-li
. Improved Color Image Encryption Algorithm Based on Quaternion Rotation[J]. Journal of Applied Sciences, 2018
, 36(4)
: 601
-610
.
DOI: 10.3969/j.issn.0255-8297.2018.04.004
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