IDF实验室之百密一疏凯撒加密

来源：互联网发布：c语言国际象棋棋盘编辑：程序博客网时间：2024/05/19 14:02

凯撒加密，原文应该全是中英文的，写个还原的代码

private void button1_Click(object sender, EventArgs e){            bool flag = true;            string kaiser = "U8Y]:8KdJHTXRI>XU#?!K_ecJH]kJG*bRH7YJH7YSH]*=93dVZ3^S8*$:8\"&:9U]RH;g=8Y!U92‘=j*$KH]ZSj&[S#!gU#*dK9\\.";            char[] kaisers = kaiser.ToCharArray();            for (int i = 0; i < 127; i++)            {                for (int j = 0; j < kaisers.Length; j++)                {                    kaisers[j] = (char)(((int)kaisers[j] + i) % 127);                    if (kaisers[j] <= 32 || kaisers[j] > 127) flag = false;                }                if (flag)                {                    kaiser = new string(kaisers);                    textBox1.Text = kaiser;                }            }}

解密出来了一个字符串

dGhlIGZsYWcgaXMgd2N0ZntrYWlzYV9qaWFhYWFhbWl9LHBseiBmbG93IG15IHdlaWJvLGh0dHAgLy93ZWliby5jb20vd29sZHk=

看起来是base64编码，解密得到

the flag is wctf{kaisa_jiaaaaami},plz flow my weibo,http //weibo.com/woldy

好了，flag是wctf{kaisa_jiaaaaami}，提交，通过！

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