public BigInteger[] EncryptMontgomery(string message, Key key)
{
montRed = new MontgomeryReducer(key.KeySecond);
int numArrayBlock = (message.Length / lenghtString) + 1;
string[] arrayString = new string[numArrayBlock];
BigInteger[] bigNumArray = new BigInteger[numArrayBlock];
for (int i = 0; i < arrayString.Length; i++)
{
if (numArrayBlock - i == 1)
{
arrayString[i] = message.Substring(i * lenghtString, message.Length - i * lenghtString);
}
else
{
arrayString[i] = message.Substring(i * lenghtString, lenghtString);
}
byte[] s = System.Text.Encoding.UTF8.GetBytes(arrayString[i]);
bigNumArray[i] = montRed.MonExp(new BigInteger(s), key.KeyFirst);
}
return(bigNumArray);
}
public string DescryptMontgomery(BigInteger[] encryptedMessage, Key key)
{
montRed = new MontgomeryReducer(key.KeySecond);
string message = "";
for (int i = 0; i < encryptedMessage.Length; i++)
{
message += System.Text.Encoding.UTF8.GetString
(montRed.MonExp(encryptedMessage[i], key.KeyFirst).ToByteArray());
}
return(message);
}