什麼是動態加密：

不知道這個算不算

///

///需要加密的字串

///

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

dest = dest.Substring(dest.Length - 2);

for (srcPos = 0; srcPos

{

srcAsc = (Convert.ToInt32(src.Substring(srcPos, 1).ToCharArray()[0]) + offset) % 255;

keyPos = keyPos

srcAsc = srcAsc ^ (Convert.ToInt32("這裡放自定義字串(adadasda)".Substring(keyPos - 1, 1).ToCharArray()[0]));

temp = srcAsc.ToString("x");

temp = temp.Length

dest = dest + temp.Substring(temp.Length - 2);

offset = srcAsc;

}

return dest;

}

///

///需要解密的字串

///

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

int tempSrcAsc = srcAsc ^ Convert.ToInt32(""這裡放自定義字串(adadasda)".Substring(keyPos - 1, 1).ToCharArray()[0]);

tempSrcAsc = tempSrcAsc

dest = dest + (char)tempSrcAsc;

offset = srcAsc;

srcPos = srcPos + 2;

} while (srcPos

return dest;

}

這個加密方式特點：同一個資料每次加密出來的字元不通，但是解密出來都相同！