一次一密加密解密算法
static int MAX=100; static char[] key=new char[MAX]; //用于保存密钥 static int len; static char[] bitcode(char[] str) //一次一密加密算法 { int i; char[] wen; if((wen=new char[len+1])==null) { System.out.printf("申请内存失败!\n"); System.exit(1); } for(i=0;i<len;i++) { wen[i]=(char)(str[i]^key[i]); //异或运算 } wen[len]='\0'; return wen; } public static void main(String[] args) throws IOException { int i; char[] srcstr=new char[MAX]; char[] miwen,mingwen; String go; Scanner input=new Scanner(System.in); // srand(time(NULL)); //随机种子 System.out.printf("一次一密加密解密算法演示。\n"); do{ System.out.printf("请输入明文字符串:"); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in)); String str=bufferedReader.readLine(); srcstr=str.toCharArray(); //明文信息 Random r=new Random(); //随机种子 len=srcstr.length; for(i=0;i<len;i++) { key[i]=(char)(r.nextInt(10)+'0'); //产生密钥序列 } System.out.printf("此次加密解密演示的密钥序列为:"); for(i=0;i<len;i++) { System.out.printf("%c",key[i]); } // System.out.printf("\n"); miwen=bitcode(srcstr); //加密 System.out.printf("\n输入的明文为:"); for(i=0;i<srcstr.length;i++) System.out.print(srcstr[i]); System.out.printf("\n加密后的密文为:"); for(i=0;i<miwen.length;i++) System.out.print(miwen[i]); mingwen=bitcode(miwen); //解密 System.out.printf("\n解密出的明文为:"); for(i=0;i<mingwen.length;i++) System.out.print(mingwen[i]); System.out.print("\n\n继续运行(y/n)?"); go=input.next(); }while(go.equalsIgnoreCase("y")); System.out.println("演示结束!"); }