Decrypt

I do not remember how to decode the information: "Q68uEbl9ZxfNoAiWtGguRQ =="


Code:
string plainText = CreditCardNumber.Text; // original plaintext string plainText2 = NameOnCard.Text; string passPhrase = "Pas5pr@seeqweqwe"; // can be any string string saltValue = "s@1tValueewqeq"; // can be any string string hashAlgorithm = "SHA1"; // can be "MD5" int passwordIterations = 2; // can be any number string initVector = "@1B2e453D4e5F6g7t"; // must be 16 bytes int keySize = 256; // can be 192 or 128 Console.WriteLine(String.Format("Plaintext : {0}", plainText)); string cipherText = RijndaelSimple.Encrypt(plainText, ...