A New Byte-Oriented Block Cipher

Xun Yi, Kwok-Yan Lam, Shixin Cheng, Xiaohu You

Abstract: In this paper, a new byte-oriented block cipher with a key of length 64 bits is proposed. In the proposed cipher, the block length is 64 bits and only byte operations are utilized. The cipher structure is composed of two simple operations (exclusive-or and addition) and three cryptographically strong S-boxes (one is 8 x 8 S-box, two are 8-bit involution S-boxes) and chosen to provide necessary confusion and diffusion and facilitate both hardware and software implementation. The design principles of the proposed cipher are explained and a sample data is given.