Image Encryption Based on Modified Logistic Map and DNA coding


K. Subhashini
Department of ECE, Sri Sai Ram Engineering College, Chennai, Tamilnadu, India.
Department of ECE, Sri Sivasubramaniya Nadar College of Engineering, Chennai, Tamilnadu, India.


The proposed image encryption algorithm uses a modified logistic map and DNA coding. The DNA coding method employs the four base pairs of the DNA code. One of the eight DNA encoding rule is selected for encoding. Permutation of image pixel values is then performed. The DNA operation is chosen to achieve diffusion of the image pixel values. The combination of the chaotic system and DNA coding achieves the cipher image. The algorithm is able to withstand statistical and differential attacks. It offers a large key space, increases ciphertext security and improves encoding efficiency, according to theoretical analysis and experimental results.