New recursive construction method of orthomorphic permutations;
正形置换的一种新递归构造方法
A criterion theorem of orthomorphic matrix and linear orthomorphic permutation is obtained by using rational standard theory of matrix and the structure of Linear orthomorphic permutation is also solved by a constructive approach.
利用矩阵的有理标准型理论 ,给出正形阵和线性正形置换的判定定理 ,构造性地解决了线性正形置换的结构问题。
1h)·h of single tree s volume is put forward on the basis of studying normal form factor.
以正形数为基础,提出V=f0 1h·g0 1h·h的单株立木材积估测式,经6个树种944株样木试验,并与二元立木材积表法进行了比较,结果表明这个立木材积式取得了良好的估计效果,可以在立木材积估测中应用。
In this paper, the encryption process of SMS4 algorithm is briefly introduced, the orthomorphic character and the correctness of encryption and decryption of improved algorithm are validated in detail, the paper also compared improved algorithm with SMS4 Algorithm in security and occupancy of resources.
本文简要介绍了SMS4密码算法的加解密原理,提出了一个对SMS4算法的改进方案,并详细对该改进方案进行了正形性以及加解密正确性的验证,同时对该方案的安全性以及资源占用情况与SMS4算法进行了对比分析。