摘要
S-盒是许多分组密码算法中唯一的非线性部件,它的密码强度决定了整个密码算法的安全强度。介绍了分组密码中S-盒的设计准则与构造方法,对S-盒设计中纠错码原理与方法进行讨论,最后给出了现代分组密码中广泛应用于S-盒设计的仿射逆函数所具有的密码特性,并证明了仿射逆函数在代数结构上存在分量函数的线性等价性。
S-box is the only nonlinear component in many cryptosystem. Therefore, the strength of S-box determines the strength of whole eryptosystem. This paper presents the design standard and construction method of S-box in block ciphers, then discusses the method of error-correcting codes used in the design of S-box, finally, gives the cryptographic property of affine inverse function on the finite field used in many modern block ciphers. It also treats of the linear equivalence between the coordinate functions in the affine inverse functions.
出处
《通信技术》
2009年第12期70-72,共3页
Communications Technology
基金
黑龙江省教育厅科学技术研究项目"基于ARM的火灾视频监控系统的设计与实现"(项目编号:11541399)
关键词
分组密码
纠错码
设计准则
构造方法
仿射逆函数
block ciphers
error-correcting codes
design standard
construction method
affine inverse function
