Cryptanalysis of a chaotic image cipher using Latin square-based confusion and diffusion

Recently, an interesting variant of chaotic image cipher using Latin square has been studied extensively, but the lack of the corresponding cryptanalysis hampers its further development. This paper performs the cryptanalysis of a newly proposed chaotic image cipher using Latin square-based confusion and diffusion. Despite the claim that the cryptosystem is of high security, we demonstrate that the cipher can be broken by chosen-plaintext attack combined with chosen-ciphertext attack. Moreover, some improvement ideas for the original algorithm are given to enhance the security.