MATHEMATICAL ANALYSIS FOR A DYNAMIC CIPHER
Yoon-Tae Jung, Eun-Hee Choi, Rim Kwang-Cheol · 2005
We present a new block cipher called DyC. It consists of four sets (procedures) having the different , and one-to-one correspondence functions as the elements. The round key is used to determine exactly one composite function from the possible composite functions. DyC supports 8 n bit key size, 16 m bit block length, and n rounds. We have confirmed that DyC offers security against other well-known advanced cryptanalytic attacks including the slide attacks and interpolation attacks. In this paper, we show several properties of the key schedule of DyC by mathematical analysis.