import sun.net.www.content.text.plain; public class Vigenere { //维吉尼亚加密算法的实现，主要问题是如何构建一个2唯的矩阵表 int num = 26*26; public static int data[][]= new int[26][26]; public static String key = "B...

public class EuclidExtend { public int gcd(int a ,int b) { int temp=0; //System.out.println("start:"); if(b!=0){ int i=1; for(i=1;a-b*i>=0;i++) { ; } temp=b; b=a-b*...

public class Caesar { //利用凯撒密码对输入的字母加密后出一个加密后的字母 public static String table = "abcdefghifjmnlqpqrstuvwxyz"; public static char cipher(char str){ int position = (table.indexOf(str)+3)%...

import java.security.SecureRandom; public class MillerRabin { public static void main(String[] args) { // TODO Auto-generated method stub System.out.println("2047\t"+Mil...

import java.math.BigInteger; import java.security.SecureRandom; import javax.crypto.Cipher; public class ModeTest { public static void main(String args[]) { // int result = ModeTes...