摘要
S盒是许多分组密码唯一的非线性部件,它的密码强度决定了整个密码算法的安全强度。足够大的S盒是安全的,但为了便于实现,分组密码多采用若干小S盒拼凑。针对一类分组密码算法,通过将S盒与密钥相关联,给出了S盒重组算法,丰富了S盒的应用模式,有效提高了分组密码的安全强度。
S-boxes are the only nonlinear components in many block cipher algorithms, and they decide the security strength of the whole algorithm. Generally speaking, a big enough S-box is secure. However, for the convenience of implementation, several small S-boxes were combined. Concerning one class of block ciphers, an S-boxes reorganized algorithm was given, which enriched S-boxes application patterns and improved the security strength.
出处
《计算机应用》
CSCD
北大核心
2009年第8期2198-2199,2203,共3页
journal of Computer Applications
基金
国家自然科学基金重大研究计划项目(90104035)
国家863计划项目(2006AA01Z425)
关键词
分组密码
S盒
重组
block cipher
S-box
reorganization
