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A new image encryption scheme is presented based on the chaotic system and the swapping operations of the pixels both at the decimal and DNA levels. By randomly choosing two arrays of the given input image for a number of times, randomly chosen pixels of these two arrays are swapped with each other. Same operation is performed on the two randomly chosen columns to get the scrambled image. Next, an XOR operation is performed between the scrambled image and the key stream of random data given by the chaotic system. Further, both the image data and the streams of random numbers are DNA-encoded. Again, the DNA-encoded pixels data are scrambled the way, scrambling was performed on the decimal data but with the different key streams of random numbers. To realize the effects of diffusion at the DNA level, the DNA-encoded scrambled pixels data and the DNA-encoded key stream are XORed …