public static string DecryptByte2Str(byte[] pwd,string nodeEntropy)
{
//byte[] pwdByte = ProtectedData.Unprotect(pwd, null, DataProtectionScope.CurrentUser);
byte[] pwdByte = ProtectedData.Unprotect(pwd, Encoding.Default.GetBytes(nodeEntropy), DataProtectionScope.CurrentUser);
string pwdStr = Encoding.Default.GetString(pwdByte);
return pwdStr;
}