private static void RunTests(int numberOfTests, int textLength, int keyLength, int lgramParameter,
double eps, string fileName)
{
for (int i = 1; i <= numberOfTests; i++)
{
startPosition = RandomNumber(textForTestsGenerating.Length - textLength - 1);
randomText = textForTestsGenerating.Substring(startPosition, textLength);
startPosition = RandomNumber(keyForTestGenerating.Length - keyLength);
randomKey = keyForTestGenerating.Substring(startPosition, keyLength);
FileHandler.WriteText(" Text:" + randomText, fileName, true);
FileHandler.WriteText(" KeyWord:" + randomKey, fileName, true);
encodedText = VigenereMethod.Encode(randomText, randomKey);
guessedKeyWordLength = KasiskiMethod.GuessKeyWordLength(encodedText, lgramParameter);
if (guessedKeyWordLength == keyLength)
{
successGuess++;
guessedKeyWord = KasiskiMethod.GuessKey(encodedText, guessedKeyWordLength);
match = Match(randomKey, guessedKeyWord);
if (match >= eps)
{
successGuessEps++;
}
if (match == 1.0)
{
successGuessWhole++;
}
FileHandler.WriteText(" Guessed key word: " + guessedKeyWord, fileName, true);
}
else
{
FileHandler.WriteText(" Guessed key word length: " + guessedKeyWordLength, fileName, true);;
}
FileHandler.WriteText("******************************************************", fileName, true);
}
FileHandler.WriteText(" Summary: TextLength: " + textLength
+ " Guessed key word length: " + successGuess / numberOfTests
+ " Guessed key word (" + eps * 100 + "% match): " + successGuessEps / numberOfTests
+ " Guessed key word (100% match): " + successGuessWhole / numberOfTests, fileName, true);
FileHandler.WriteText("----------------------------------------------------------", fileName, true);
}
static void Main(string[] args)
{
string text;
string encodedText;
int position = 3;
int lgramParameter = 4;
int numberOfTests = 30;
double eps = 0.2;
int textLength = 1000;
int keyLength = 8;
string fileInput = "Text.txt";
string fileOutputCaesarEncode = "CaesarEncode.txt";
string fileOutputCaesarDecode = "CaesarDecode.txt";
string fileOutputVigenereEncode = "VigenereEncode.txt";
string fileOutputVigenereDecode = "VigenereDecode.txt";
text = FileHandler.ReadText(fileInput);
encodedText = CaesarMethod.Encode(text, position);
FileHandler.WriteText(encodedText, fileOutputCaesarEncode, false);
FileHandler.WriteText(CaesarMethod.Decode(encodedText, position), fileOutputCaesarDecode, false);
string key = "supernatural".ToUpper();
encodedText = VigenereMethod.Encode(text, key);
FileHandler.WriteText(encodedText, fileOutputVigenereEncode, false);
FileHandler.WriteText(VigenereMethod.Decode(encodedText, key), fileOutputVigenereDecode, false);
int guessedKeyLength = KasiskiMethod.GuessKeyWordLength(encodedText, lgramParameter);
FileHandler.WriteText("----------------------------------------------------------",
fileOutputVigenereDecode, true);
FileHandler.WriteText("Guessed key word length: " + guessedKeyLength, fileOutputVigenereDecode, true);
TestsHandler.AttackAnalysisTextLength(numberOfTests, eps, keyLength, lgramParameter);
TestsHandler.AttackAnalysisKeyLength(numberOfTests, eps, textLength, lgramParameter);
Console.WriteLine("Press any key to continue...");
Console.ReadKey();
}
