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. 2012:2012:286741.
doi: 10.1100/2012/286741. Epub 2012 Oct 11.

A novel image encryption algorithm based on DNA subsequence operation

Qiang Zhang  1 , Xianglian Xue, Xiaopeng Wei
Affiliations

A novel image encryption algorithm based on DNA subsequence operation

Qiang Zhang et al. ScientificWorldJournal. 2012.

Abstract

We present a novel image encryption algorithm based on DNA subsequence operation. Different from the traditional DNA encryption methods, our algorithm does not use complex biological operation but just uses the idea of DNA subsequence operations (such as elongation operation, truncation operation, deletion operation, etc.) combining with the logistic chaotic map to scramble the location and the value of pixel points from the image. The experimental results and security analysis show that the proposed algorithm is easy to be implemented, can get good encryption effect, has a wide secret key's space, strong sensitivity to secret key, and has the abilities of resisting exhaustive attack and statistic attack.

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Figures

Figure 1
Figure 1
Elongation and truncation operation of DNA subsequences.
Figure 2
Figure 2
The block diagram of the proposed algorithm. (a) The block diagram of the encryption algorithm. (b) The block diagram of the decryption algorithm.
Figure 3
Figure 3
Encrypted image and decrypted image. (a) The original image. (b) The encrypted image. (c) The decrypted image under the wrong secret keys. (d) The decrypted image under the correct secret keys.
Figure 4
Figure 4
The sensitivity of secret key x 0. (a) The decrypted image with secret key (0.95000000000001,3.2,0.17,0.25,3.3,0.14). (b) The corresponding histogram.
Figure 5
Figure 5
The grey histogram of the original image and the encrypted image. (a) The grey histogram of the original image. (b) The grey histogram of the encrypted image.
Figure 6
Figure 6
Correlation of two horizontally adjacent pixels in the original image and in the encrypted image.
Algorithm 1
Algorithm 1
An image encryption algorithm based on DNA subsequence operation.
Algorithm 2
Algorithm 2
An image decryption algorithm based on DNA subsequence operation.
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