  In this paper we have proposed a method that uses chaotic logistic mapping
and DNA encoding to encrypt the image. A 32 bit ASCII private key is used to
diffuse the image. The results demonstrated clearly show that encryption
algorithm based on chaotic logistic mapping and DNA encoding gives better
result than encrypting only with chaotic logistic mapping. The proposed method
also takes into account the possible parametric like Peak Signal to Noise Ratio
and Structure Similarity.
