Dear editor,Block ciphers are one of the most important building blocks in many cryptosystems.Modern block ciphers are often iterations with several rounds,where each round comprises a(nonlinear)confusion layer and a(linear)diffusion layer.The diffusion layer plays a significant role in block ciphers Dear editor, Block ciphers are one of the most important building blocks in many cryptosystems. Modern block ciphers are often iterations with several rounds, where each round includes a (nonlinear) confusion layer and a (linear) diffusion layer. significant role in block ciphers