ABSTRACT
This chapter proposes two image encryption schemes using DNA sequence operations and chaotic maps: a parallel sub-image encryption scheme and a triple image encryption scheme. In 2013, H. Zhang et al. presented a novel image encryption algorithm that uses the simple theory of pseudo-DNA sequence operation to encrypt images. The most suitable technique for securing images is an encryption methodology. Hence, to enhance security, chaotic maps are combined with DNA cryptography to solve the hidden security problems. The DNA sequence operations are equivalent to traditional binary sequence operations. The DNA decoding operation is same as the DNA encoding operation. DNA computing is one of the most successful techniques in image encryption. In a parallel sub-image encryption scheme, the image is divided into eight parts, and all the parts are operated in parallel. In a triple image encryption, three images are encrypted at the same time by using a single encryption algorithm.
