public string Decrpyt1(string cipher, string key)
        {
            var keyModel   = new CryptionKey();
            var blockModel = new Block();

            keyModel.Set64Bitkey(key);
            keyModel.SetKey(key, false);
            var bin = cipher;
            var permutedbinBlocks = blockModel.SplitBlockIntoStrings(bin);
            var splittedKey       = blockModel.SplitBlockIntoStrings(blockModel.ConvertStringToBinaryString(key));
            var leftSide          = new string[17];

            leftSide[16] = permutedbinBlocks[0];
            var rightSide = new string[17];

            rightSide[16] = permutedbinBlocks[1];
            for (int i = 16; i >= 1; i--)
            {
                //rightSide[i - 1] = blockModel.XORTwoBinaryStrings(rightSide[i], blockModel.XORTwoBinaryStrings(i % 2 == 0 ? splittedKey[0] : splittedKey[1], leftSide[i]));
                //rightSide[i - 1] = blockModel.XORTwoBinaryStrings(rightSide[i], blockModel.XORTwoBinaryStrings(keyModel.Get32BitKey(i), leftSide[i]));
                rightSide[i - 1] = blockModel.XORTwoBinaryStrings(leftSide[i], FunctionF(rightSide[i], keyModel.GetKey(i)));
                leftSide[i - 1]  = rightSide[i];
            }
            var cipherText = blockModel.InverseInitialPermutation(rightSide[0] + leftSide[0]);

            return(rightSide[0] + leftSide[0]);
        }
        public string Encrpyt1(string plainText, string key)
        {
            var keyModel   = new CryptionKey();
            var blockModel = new Block();

            keyModel.Set64Bitkey(key);
            keyModel.SetKey(key, false);
            var bin = blockModel.ConvertStringToBinaryString(plainText);
            //var permutedBin = blockModel.InitialPermutation(bin);
            var permutedbinBlocks = blockModel.SplitBlockIntoStrings(bin);
            var splittedKey       = blockModel.SplitBlockIntoStrings(blockModel.ConvertStringToBinaryString(key));
            var leftSide          = new string[17];

            leftSide[0] = permutedbinBlocks[0];
            var rightSide = new string[17];

            rightSide[0] = permutedbinBlocks[1];
            for (int i = 1; i <= 16; i++)
            {
                //rightSide[i] = blockModel.XORTwoBinaryStrings(rightSide[i - 1], blockModel.XORTwoBinaryStrings(i % 2 == 0 ? splittedKey[0] : splittedKey[1], leftSide[i - 1]));
                //rightSide[i] = blockModel.XORTwoBinaryStrings(rightSide[i - 1], blockModel.XORTwoBinaryStrings(keyModel.Get32BitKey(i), leftSide[i - 1]));
                rightSide[i] = blockModel.XORTwoBinaryStrings(leftSide[i - 1], FunctionF(rightSide[i - 1], keyModel.GetKey(i)));
                leftSide[i]  = rightSide[i - 1];
            }
            return(rightSide[16] + leftSide[16]);
        }