Abstract
DNA computing based image encryption is a new, promising field. In this paper, we propose a novel image encryption scheme based on DNA encoding and spatiotemporal chaos. In particular, after the plain image is primarily diffused with the bitwise Exclusive-OR operation, the DNA mapping rule is introduced to encode the diffused image. In order to enhance the encryption, the spatiotemporal chaotic system is used to confuse the rows and columns of the DNA encoded image. The experiments demonstrate that the proposed encryption algorithm is of high key sensitivity and large key space, and it can resist brute-force attack, entropy attack, differential attack, chosen-plaintext attack, known-plaintext attack and statistical attack.
Highlights
With the rapid development of Internet and communication technologies, image communication plays a very important role in information transmission, and the image encryption has attracted more and more attention
Pareek [6] introduced an image encryption approach based on two chaotic Logistic maps, in which the initial condition of the second Logistic map was modified from the numbers generated by the first Logistic map
Taking the advantages of spatiotemporal chaos and DNA computing into account, the paper proposes an image encryption algorithm using the spatiotemporal chaotic system based on NCA map and the DNA complementary rule
Summary
With the rapid development of Internet and communication technologies, image communication plays a very important role in information transmission, and the image encryption has attracted more and more attention. The NCA (Nonlinear Chaotic Algorithm) map based spatiotemporal chaos [11] is introduced for the image encryption. Gehani et al [16] presented a DNA-based cryptography based on one-time-pads that are in principle unbreakable Because such experiments need nature DNA sequences to encoding the information, it can only be done in a well-equipped lab and needs high cost. Liu [15] developed an image encryption method using DNA complementary rule and piecewise linear chaotic map. These results demonstrated that the good encryption result could be achieved with. Taking the advantages of spatiotemporal chaos and DNA computing into account, the paper proposes an image encryption algorithm using the spatiotemporal chaotic system based on NCA map and the DNA complementary rule.
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