Improvement for block cipher based on S-box reorganization
S-box is the core of block ciphers.Its cryptographic properties impact on the security of block ciphers directly.From S-box inherent weaknesses,this paper adopt Fractal theory,and put forward a method based on non S-box transformation to change the S-box using sequence,that is,using the sub-key of each round to determine the S-box sequence by Fractal theory,then the effects different keys in each encryption come true.The method improved encryption algorithm,enhanced encryption strength and increased the algorithms security.
S-box Fractal theory block cipher
Tang Songsheng Ma Xianzhen
QingDao University of science&technology College of information science&technology QingDao,China
国际会议
太原
英文
68-70
2011-02-26（万方平台首次上网日期，不代表论文的发表时间）