Question

跪求用C#编写的动态密匙加密程序

Answer 1

什么是动态加密：
不知道这个算不算
///<summary>密码加密</summary>
///<param name="src">需要加密的字符串</param>
/// <returns>string</returns>
public static string EncrpyKey(string src)
{
int keyPos = 0, offset = 0, srcPos = 0, srcAsc = 0, range = 256;
string dest = "", temp = "";
Random rd = new Random();
offset = rd.Next(range);
dest = offset.ToString("x");
dest = dest.Length < 2 ? "0" + dest : dest;
dest = dest.Substring(dest.Length - 2);
for (srcPos = 0; srcPos < src.Length; srcPos++)
{
srcAsc = (Convert.ToInt32(src.Substring(srcPos, 1).ToCharArray()[0]) + offset) % 255;
keyPos = keyPos < 0 ? keyPos + 1 : 1;
srcAsc = srcAsc ^ (Convert.ToInt32("这里放自定义字符串(adadasda)".Substring(keyPos - 1, 1).ToCharArray()[0]));
temp = srcAsc.ToString("x");
temp = temp.Length < 2 ? "0" + temp : temp;
dest = dest + temp.Substring(temp.Length - 2);
offset = srcAsc;
}
return dest;
}
///<summary>密码解密</summary>
///<param name="src">需要解密的字符串</param>
/// <returns>string</returns>
public static string UncrypKey(string src)
{
int keyPos = 0, srcPos = 3, srcAsc = 0,
offset = Int32.Parse(src.Substring(0, 2), System.Globalization.NumberStyles.AllowHexSpecifier);
string dest = "";
do
{
srcAsc = Int32.Parse(src.Substring(srcPos - 1, 2), System.Globalization.NumberStyles.AllowHexSpecifier);
keyPos = keyPos < 0 ? keyPos + 1 : 1;
int tempSrcAsc = srcAsc ^ Convert.ToInt32(""这里放自定义字符串(adadasda)".Substring(keyPos - 1, 1).ToCharArray()[0]);
tempSrcAsc = tempSrcAsc <= offset ? 255 + tempSrcAsc - offset : tempSrcAsc - offset;
dest = dest + (char)tempSrcAsc;
offset = srcAsc;
srcPos = srcPos + 2;
} while (srcPos <= src.Length);
return dest;
}

这个加密方式特点：同一个数据每次加密出来的字符不通，但是解密出来都相同！

Answer 2

没有