Implementasi Kombinasi Algoritma Vigenere dan Algoritma Data Encryption Standard (DES) pada Aplikasi Short Message Service (SMS) Berbasis Windows Phone

59

LISTING PROGRAM

Form Utama :
using
using
using
using
using
using
using
using
using
using

System;
System.Collections.Generic;
System.Linq;
System.Net;
System.Windows;

System.Windows.Controls;
System.Windows.Navigation;
Microsoft.Phone.Controls;
Microsoft.Phone.Shell;
vigenere_des.Resources;

namespace vigenere_des
{
public partial class MainPage : PhoneApplicationPage
{
public MainPage()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
Application.Current.Terminate();
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{

NavigationService.Navigate(new
Uri("/Page1.xaml",
UriKind.RelativeOrAbsolute));
}
private void Button_Click_2(object sender, RoutedEventArgs e)
{
NavigationService.Navigate(new
Uri("/Page2.xaml",
UriKind.RelativeOrAbsolute));
}
private void Button_Click_3(object sender, RoutedEventArgs e)
{
NavigationService.Navigate(new
Uri("/Page3.xaml",
UriKind.RelativeOrAbsolute));
}
private void Button_Click_4(object sender, RoutedEventArgs e)
{
NavigationService.Navigate(new
Uri("/Page4.xaml",

UriKind.RelativeOrAbsolute));
}
}
}

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Form Buat Pesan :
using
using
using
using
using
using
using
using
using
using

using
using
using
using

System;
System.IO;
System.Collections.Generic;
System.Linq;
System.Net;
System.Windows;
System.Windows.Controls;
System.Windows.Navigation;
Microsoft.Phone.Controls;
Microsoft.Phone.Shell;
Microsoft.Phone.UserData;
System.Security.Cryptography;
System.Text;
Microsoft.Phone.Tasks;

namespace vigenere_des
{
public partial class Page3 : PhoneApplicationPage
{
public Page3()
{
InitializeComponent();
}
string enkripsiv(string pesan, string kunci)
{
int pjgkunci = kunci.Length;
int pjgpesan = pesan.Length;
string hasil = "";
for (int i = 0; i < pjgpesan; i++)
{
hasil = hasil + Convert.ToChar((((int)pesan[i]
(int)kunci[i % (pjgkunci)]) % 95) + 32);
}

+

return hasil;
}
private void Button2_Click(object sender, RoutedEventArgs e)
{
string message = plaint.Text;
string key = plaink.Text;
ciphert.Text = enkripsiv(message, key);
}
private void Button3_Click(object sender, RoutedEventArgs e)
{
Cryptographer
cryptographer
=
new
Cryptographer(Algorithms.DES);
cipherk.Text = cryptographer.EncryptionStart(plaink.Text,
desk.Text.ToUpper(), false);
}

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private void Button4_Click(object sender, RoutedEventArgs e)
{
SmsComposeTask smsComposeTask = new SmsComposeTask();
smsComposeTask.To = buku_telepon.Text;
smsComposeTask.Body = ciphert.Text;
smsComposeTask.Show();
}
string data;
private void txtName_GotFocus(object sender, RoutedEventArgs
e)
{
TextBox t = sender as TextBox;
data = t.Text;
t.Text = string.Empty;
}
private void txtName_LostFocus(object sender, RoutedEventArgs

e)
{
TextBox t = sender as TextBox;
if (t.Text.Equals(string.Empty))
{
t.Text = data;
}
}
private void Button1_Click(object sender, RoutedEventArgs e)
{
Contacts cons = new Contacts();
cons.SearchCompleted
+=
new
EventHandler(Contacts_SearchCompleted);
cons.SearchAsync(String.Empty, FilterKind.None, "Contacts
Test #1");
}
void
Contacts_SearchCompleted(object

ContactsSearchEventArgs e)
{
System.Text.StringBuilder
sb
System.Text.StringBuilder();

sender,

=

new

foreach (Contact con in e.Results)
{
sb.AppendLine(con.DisplayName);
}
MessageBox.Show(sb.ToString());
}
}
}

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Form Dekrip Pesan :
using
using
using
using
using
using
using
using
using

System;
System.Collections.Generic;
System.Linq;
System.Net;

System.Windows;
System.Windows.Controls;
System.Windows.Navigation;
Microsoft.Phone.Controls;
Microsoft.Phone.Shell;

namespace vigenere_des
{
public partial class Page4 : PhoneApplicationPage
{
public Page4()
{
InitializeComponent();
}
string dekripsiv(string pesan, string kunci)
{
int pjgkunci = kunci.Length;
int pjgpesan = pesan.Length;
string hasil = "";
for (int i = 0; i < pjgpesan; i++)
{
if ((((int)pesan[i] - 32) - (int)kunci[i % (pjgkunci
- 1)]) < -63)
{
hasil = hasil + Convert.ToChar((((int)pesan[i] 32) - (int)kunci[i % (pjgkunci)]) + 190);
}
else if ((((int)pesan[i] - 32) - (int)kunci[i %
(pjgkunci - 1)]) < 32)
{
hasil = hasil + Convert.ToChar((((int)pesan[i] 32) - (int)kunci[i % (pjgkunci)]) + 95);
}
else
{
hasil = hasil + Convert.ToChar((((int)pesan[i] 32) - (int)kunci[i % (pjgkunci)]) % 95);
}
}
return hasil;
}
private void Button3_Click(object sender, RoutedEventArgs e)
{
string message = ciphert1.Text;
string key = plaink1.Text;
plaint1.Text = dekripsiv(message, key);
}
private void Button2_Click(object sender, RoutedEventArgs e)

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{
Cryptographer
cryptographer
Cryptographer(Algorithms.DES);
plaink1.Text
cryptographer.DecryptionStart(cipherk1.Text,
false);
}
private
void
TextChangedEventArgs e)
{

=

new

=
desk.Text.ToUpper(),

plaint_TextChanged(object

sender,

}
string data;
private void txtName_GotFocus(object sender, RoutedEventArgs
e)
{
TextBox t = sender as TextBox;
data = t.Text;
t.Text = string.Empty;
}
private void txtName_LostFocus(object sender, RoutedEventArgs
e)
{
TextBox t = sender as TextBox;
if (t.Text.Equals(string.Empty))
{
t.Text = data;
}
}
}
}

Class Algorithms.cs :
using System;
using System.Collections.Generic;
using System.Text;
namespace vigenere_des
{
class Algorithms
{
public static readonly int DES = 0;
}
}

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Class Cryptographer.cs :
using
using
using
using

System;
System.Collections.Generic;
System.Text;
System.Threading;

namespace vigenere_des
{
class Cryptographer
{
CommonProcess cProcess = null;
public Cryptographer(int algorithm_number)
{
if (Algorithms.DES == algorithm_number)
{
cProcess = new DES.ProcessDES();
}
}
public string EncryptionStart(string text, string key, bool
IsBinary)
{
return cProcess.EncryptionStart(text, key, IsBinary);
}
public string DecryptionStart(string text, string key, bool
IsBinary)
{
return cProcess.DecryptionStart(text, key, IsBinary);
}
}
}

Class Commonprocess.cs :

using System;
using System.Collections.Generic;
using System.Text;
namespace vigenere_des
{
abstract class CommonProcess
{
public abstract string EncryptionStart(string
key, bool IsTextBinary);
public abstract string
key, bool IsTextBinary);
}
}

DecryptionStart(string

text,

string

text,

string

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Class DESData.cs :
using System;
using System.Collections.Generic;
using System.Text;
namespace vigenere_des.DES
{
#region tabel permutasi
class DESData
{
public static readonly int[] pc_1 ={
9, 1, 58, 50,
42,
51, 43, 35,
27,
36, 63, 55,
47,
54, 46, 38,
30,
37, 29, 21,
13,

57, 49, 41, 33, 25, 17,
34, 26, 18, 10, 2, 59,
19, 11, 3, 60, 52, 44,
39, 31, 23, 15, 7, 62,
22, 14, 6, 61, 53, 45,
5, 28, 20, 12, 4 };

public static readonly int[] pc_2 ={ 14, 17, 11, 24, 1, 5, 3,
28, 15, 6, 21,
10, 23, 19, 12, 4, 26, 8,
16, 7, 27,
20, 13, 2, 41, 52, 31, 37,
47, 55, 30,
40, 51, 45, 33, 48, 44, 49,
39, 56, 34,
53, 46, 42, 50, 36, 29, 32
};
public static readonly int[] ip ={ 58, 50, 42, 34, 26, 18,
10, 2, 60, 52,
44, 36, 28, 20, 12, 4, 62,
54, 46, 38,
30, 22, 14, 6, 64, 56, 48,
40, 32, 24,
16, 8, 57, 49, 41, 33, 25,
17, 9, 1, 59,
51, 43, 35, 27, 19, 11, 3,
61, 53, 45,
37, 29, 21, 13, 5, 63, 55,
47, 39, 31,
23, 15, 7 };
public static readonly int[] ip_1 ={ 40, 8, 48, 16,
64, 32, 39, 7,
47, 15, 55, 23,
38, 6, 46, 14,
54, 22, 62, 30,
45, 13, 53, 21,
61, 29, 36, 4,
52, 20, 60, 28,
35, 3, 43, 11,
59, 27, 34, 2,

56, 24,
63, 31,
37,

5,

44,

12,

51,

19,

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42, 10, 50, 18, 58, 26,
33, 1, 41, 9,
49, 17, 57, 25 };
public static readonly int[] pc_e ={ 32, 1, 2, 3,
6, 7, 8, 9, 8,
9, 10, 11, 12,
14, 15, 16,
17, 16, 17, 18,
20, 21, 22,
23, 24, 25, 24,
28, 29, 28,
29, 30, 31, 32,

4, 5, 4, 5,
13, 12, 13,
19, 20, 21,
25, 26, 27,
1 };

public static readonly int[] pc_p ={ 16, 7, 20, 21, 29, 12,
28, 17, 1, 15, 23,
26, 5, 18, 31, 10, 2, 8,
24, 14, 32,
27, 3, 9, 19, 13, 30, 6,
22, 11, 4, 25 };

public static readonly int[] nrOfShifts ={ 0, 1, 1, 2, 2, 2,
2, 2, 2, 1,
2, 2, 2, 2, 2, 2, 1
};
public static List sBoxes = new List();
static DESData()
{
sBoxes.Add(s1);
sBoxes.Add(s2);
sBoxes.Add(s3);
sBoxes.Add(s4);
sBoxes.Add(s5);
sBoxes.Add(s6);
sBoxes.Add(s7);
sBoxes.Add(s8);
}
public static readonly int[,] s1 ={ { 14, 4, 13, 1, 2, 15,
11, 8, 3, 10, 6, 12, 5, 9, 0, 7 },
{ 0, 15, 7, 4, 14, 2, 13, 1,
10, 6, 12, 11, 9, 5, 3, 8 },
{ 4, 1, 14, 8, 13, 6, 2, 11,
15, 12, 9, 7, 3, 10, 5, 0 },
{ 15, 12, 8, 2, 4, 9, 1, 7,
5, 11, 3, 14, 10, 0, 6, 13 } };
public static readonly int[,] s2 ={ { 15,
4, 9, 7, 2, 13, 12, 0, 5, 10 },
{ 3, 13,
12, 0, 1, 10, 6, 9, 11, 5 },
{ 0, 14,
1, 5, 8, 12, 6, 9, 3, 2, 15 },
{ 13, 8,
11, 6, 7, 12, 0, 5, 14, 9 } };

1, 8, 14, 6, 11, 3,
4, 7, 15, 2, 8, 14,
7, 11, 10, 4, 13,
10, 1, 3, 15, 4, 2,

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public static readonly int[,] s3 ={ { 10,
5, 1, 13, 12, 7, 11, 4, 2, 8 },
{ 13, 7,
2, 8, 5, 14, 12, 11, 15, 1 },
{ 13, 6,
11, 1, 2, 12, 5, 10, 14, 7 },
{ 1, 10,
4, 15, 14, 3, 11, 5, 2, 12 } };

0, 9, 14, 6, 3, 15,
0, 9, 3, 4, 6, 10,
4, 9, 8, 15, 3, 0,
13, 0, 6, 9, 8, 7,

public static readonly int[,] s4 ={ { 7, 13, 14, 3, 0, 6,
10, 1, 2, 8, 5, 11, 12, 4, 15 },
{ 13, 8, 11, 5, 6, 15, 0,
4, 7, 2, 12, 1, 10, 14, 9 },
{ 10, 6, 9, 0, 12, 11,
13, 15, 1, 3, 14, 5, 2, 8, 4 },
{ 3, 15, 0, 6, 10, 1, 13,
9, 4, 5, 11, 12, 7, 2, 14 } };

9,
3,
7,
8,

public static readonly int[,] s5 ={ { 2, 12, 4, 1, 7, 10, 11,
6, 8, 5, 3, 15, 13, 0, 14, 9 },
{ 14, 11, 2, 12, 4, 7, 13,
1, 5, 0, 15, 10, 3, 9, 8, 6 },
{ 4, 2, 1, 11, 10, 13, 7, 8,
15, 9, 12, 5, 6, 3, 0, 14 },
{ 11, 8, 12, 7, 1, 14, 2,
13, 6, 15, 0, 9, 10, 4, 5, 3 } };
public static readonly int[,] s6 ={ { 12, 1, 10, 15, 9, 2, 6,
8, 0, 13, 3, 4, 14, 7, 5, 11 },
{ 10, 15, 4, 2, 7, 12, 9, 5,
6, 1, 13, 14, 0, 11, 3, 8 },
{ 9, 14, 15, 5, 2, 8, 12, 3,
7, 0, 4, 10, 1, 13, 11, 6 },
{ 4, 3, 2, 12, 9, 5, 15, 10,
11, 14, 1, 7, 6, 0, 8, 13 } };
public static readonly int[,] s7 ={ { 4, 11, 2, 14, 15, 0, 8,
13, 3, 12, 9, 7, 5, 10, 6, 1 },
{ 13, 0, 11, 7, 4, 9, 1, 10,
14, 3, 5, 12, 2, 15, 8, 6 },
{ 1, 4, 11, 13, 12, 3, 7,
14, 10, 15, 6, 8, 0, 5, 9, 2 },
{ 6, 11, 13, 8, 1, 4, 10, 7,
9, 5, 0, 15, 14, 2, 3, 12 } };
public static readonly int[,] s8 ={ {
1, 10, 9, 3, 14, 5, 0, 12, 7 },
{ 1,
12, 5, 6, 11, 0, 14, 9, 2 },
{ 7,
0, 6, 10, 13, 15, 3, 5, 8 },
{ 2,
15, 12, 9, 0, 3, 5, 6, 11 } };
}
#endregion

13, 2, 8, 4, 6, 15, 11,
15, 13, 8, 10, 3, 7, 4,
11, 4, 1, 9, 12, 14, 2,
1, 14, 7, 4, 10, 8, 13,

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#region pembuatan kelas kunci
class Keys
{
public string[] Cn = new string[17];
public string[] Dn = new string[17];
public string[] Kn = new string[16];
}
#endregion
}

Class ProcessDES.cs :
using System;
using System.Collections.Generic;
using System.Text;
namespace vigenere_des.DES
{
class ProcessDES : CommonProcess
{
public ProcessDES()
{
}
#region proses enkripsi
public override string EncryptionStart(string
key, bool IsTextBinary)
{
#region pengambilan 16 kunci

text,

string

string binary_key = this.FromTextToBinary(key);
string
key_plus
=
this.DoPermutation(binary_key,
DESData.pc_1);
string C0 = "", D0 = "";
C0 = this.SetLeftHalvesKey(key_plus);
D0 = this.SetRightHalvesKey(key_plus);
Keys keys = this.SetAllKeys(C0, D0);
#endregion
#region proses enkripsi
string binaryText = "";
if (IsTextBinary == false)
{
binaryText = this.FromTextToBinary(text);
}
else
{
binaryText = text;
}

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binaryText = this.setTextMutipleOf64Bits(binaryText);

StringBuilder
EncryptedTextBuilder
StringBuilder(binaryText.Length);

=

new

for (int i = 0; i < (binaryText.Length / 64); i++)
{
string
PermutatedText
this.DoPermutation(binaryText.Substring(i * 64, 64), DESData.ip);

=

string L0 = "", R0 = "";
L0 = this.SetLeftHalvesKey(PermutatedText);
R0 = this.SetRightHalvesKey(PermutatedText);
string FinalText = this.FinalEncription(L0, R0, keys,
false);
string selesai = BinaryStringToHexString(FinalText);
EncryptedTextBuilder.Append(selesai);

}
return EncryptedTextBuilder.ToString();
#endregion
}
#endregion
#region proses dekripsi
public override string DecryptionStart(string
key, bool IsTextBinary)
{
#region pengambilan 16 kunci

text,

string

string binary_key = this.FromTextToBinary(key);
string
key_plus
=
this.DoPermutation(binary_key,
DESData.pc_1);
string C0 = "", D0 = "";
C0 = this.SetLeftHalvesKey(key_plus);
D0 = this.SetRightHalvesKey(key_plus);
Keys keys = this.SetAllKeys(C0, D0);
#endregion
#region proses dekripsi
string binaryText = "";
if (IsTextBinary == false)
{
binaryText = this.FromHexToBinary(text);
}
else
{

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binaryText = text;
}
binaryText = this.setTextMutipleOf64Bits(binaryText);

StringBuilder
DecryptedTextBuilder
StringBuilder(binaryText.Length);

=

for (int i = 0; i < (binaryText.Length / 64); i++)
{
string
PermutatedText
this.DoPermutation(binaryText.Substring(i * 64, 64), DESData.ip);

new

=

string L0 = "", R0 = "";
L0 = this.SetLeftHalvesKey(PermutatedText);
R0 = this.SetRightHalvesKey(PermutatedText);
string FinalText = this.FinalEncription(L0, R0, keys,
true);
string selesai = FromBinaryToText(FinalText);
DecryptedTextBuilder.Append(selesai);
}
return DecryptedTextBuilder.ToString();
#endregion
}
#endregion
public static string BinaryStringToHexString(string binary)
{
StringBuilder result = new StringBuilder(binary.Length /
8 + 1);
int mod4Len = binary.Length % 8;
if (mod4Len != 0)
{
binary = binary.PadLeft(((binary.Length / 8) + 1) *
8, '0');
}
for (int i = 0; i < binary.Length; i += 8)
{
string eightBits = binary.Substring(i, 8);
result.AppendFormat("{0:X2}",
Convert.ToByte(eightBits, 2));
}
return result.ToString();
}
#region mengubah biner menjadi ascii
public string FromBinaryToText(string binarystring)
{
StringBuilder
text
=
StringBuilder(binarystring.Length / 8);

new

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for (int i = 0; i < (binarystring.Length / 8); i++)
{
string word = binarystring.Substring(i * 8, 8);
text.Append((char)Convert.ToInt32(word, 2));
}
return text.ToString();
}
#endregion
#region pembagian teks menjadi 64 bit
public string setTextMutipleOf64Bits(string text)
{
if ((text.Length % 64) != 0)
{
int maxLength = 0;
maxLength = ((text.Length / 64) + 1) * 64;
text = text.PadRight(maxLength, '0');
}
return text;
}
#endregion
#region mengubah ASCII menjadi biner
public string FromTextToBinary(string text)
{
StringBuilder
binarystring
StringBuilder(text.Length * 8);

=

new

foreach (char word in text)
{
int binary = (int)word;
int factor = 128;
for (int i = 0; i < 8; i++)
{
if (binary >= factor)
{
binary -= factor;
binarystring.Append("1");
}
else
{
binarystring.Append("0");
}
factor /= 2;
}
}
return binarystring.ToString();
}
public static string FromDeciamlToBinary(int binary)
{
if (binary < 0)
{
Console.WriteLine("It requires a integer greater than
0.");
return null;

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}
string binarystring = "";
int factor = 128;
for (int i = 0; i < 8; i++)
{
if (binary >= factor)
{
binary -= factor;
binarystring += "1";
}
else
{
binarystring += "0";
}
factor /= 2;
}
return binarystring;
}
public static byte FromBinaryToByte(string binary)
{
byte value = 0;
int factor = 128;
for (int i = 0; i < 8; i++)
{
if (binary[i] == '1')
{
value += (byte)factor;
}
factor /= 2;
}
return value;
}
#endregion
#region mengubah heksa ke biner
public string FromHexToBinary(string hexstring)
{
string binarystring = "";
try
{
for (int i = 0; i < hexstring.Length; i++)
{
int
hex
Convert.ToInt32(hexstring[i].ToString(), 16);

=

int factor = 8;
for(int j=0; j= factor)
{
hex -= factor;

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binarystring += "1";
}
else
{
binarystring += "0";
}
factor /= 2;
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message + " - wrong hexa integer
format.");
}
return binarystring;
}
#endregion
#region perulangan
public string DoPermutation(string text, int[] order)
{
StringBuilder
PermutatedText
=
StringBuilder(order.Length);

new

for (int i = 0; i < order.Length; i++)
{
PermutatedText.Append(text[order[i] - 1]);
}
return PermutatedText.ToString();
}
//untuk S box
public string DoPermutation(string text, int[,] order)
{
string PermutatedText = "";
int
rowIndex
=
Convert.ToInt32(text[0].ToString()
+
text[text.Length - 1].ToString(), 2);
int colIndex = Convert.ToInt32(text.Substring(1, 4), 2);
PermutatedText
ProcessDES.FromDeciamlToBinary(order[rowIndex, colIndex]);

=

return PermutatedText;
}
#endregion
#region memecah blok menjadi kiri dan kanan
public string SetLeftHalvesKey(string text)
{
return this.SetHalvesKey(true, text);
}
public string SetRightHalvesKey(string text)
{
return this.SetHalvesKey(false, text);
}

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public string SetHalvesKey(bool IsLeft, string text)
{
if ((text.Length % 8) != 0)
{
Console.WriteLine("The
key
is
not
multiple

of

8bit.");
return null;
}
int midindex = (text.Length / 2) - 1;
string result = "";
if (IsLeft)
{
result = text.Substring(0, midindex + 1);
}
else
{
result = text.Substring(midindex + 1);
}
return result;
}
#endregion
#region pergeseran ke kiri
public string LeftShift(string text)
{
return this.LeftShift(text, 1);
}
public string LeftShift(string text, int count)
{
if (count < 1)
{
Console.WriteLine("The count of leftshift
more than 1 time.");
return null;
}

is

must

string temp = text.Substring(0, count);
StringBuilder shifted = new StringBuilder(text.Length);
shifted.Append(text.Substring(count) + temp);
return shifted.ToString();
}
#endregion
#region pengmabilan semua kunci
public Keys SetAllKeys(string C0, string D0)
{
Keys keys = new Keys();
keys.Cn[0] = C0;
keys.Dn[0] = D0;
for (int i = 1; i < keys.Cn.Length; i++)
{

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keys.Cn[i]
=
DESData.nrOfShifts[i]);
keys.Dn[i]
=
DESData.nrOfShifts[i]);
keys.Kn[i - 1]
keys.Dn[i], DESData.pc_2);
}

this.LeftShift(keys.Cn[i

-

1],

this.LeftShift(keys.Dn[i

-

1],

=

this.DoPermutation(keys.Cn[i]

+

return keys;
}
#endregion
#region enkripsi
public string FinalEncription(string L0, string
keys, bool IsReverse)
{
string Ln = "", Rn = "", Ln_1 = L0, Rn_1 = R0;

R0,

Keys

int i = 0;
if (IsReverse == true)
{
i = 15;
}
while (this.IsEnough(i, IsReverse))
{
Ln = Rn_1;
Rn = this.XOR(Ln_1, this.f(Rn_1, keys.Kn[i]));
Ln_1 = Ln;
Rn_1 = Rn;
if (IsReverse == false)
{
i += 1;
}
else
{
i -= 1;
}
}
string R16L16 = Rn + Ln;
string
DESData.ip_1);

Encripted_Text

=

this.DoPermutation(R16L16,

return Encripted_Text;
}
public bool IsEnough(int i, bool IsReverse)
{
return (IsReverse == false) ? i < 16 : i >= 0;
}
#endregion
#region fungsi f
public string f(string Rn_1, string Kn)
{

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string E_Rn_1 = this.E_Selection(Rn_1);
string XOR_Rn_1_Kn = this.XOR(E_Rn_1, Kn);
string sBoxedText = this.sBox_Transform(XOR_Rn_1_Kn);
string P_sBoxedText = this.P(sBoxedText);
return P_sBoxedText;
}
#endregion
#region fungsi P
public string P(string text)
{
string PermutatedText = "";
PermutatedText = this.DoPermutation(text, DESData.pc_p);
return PermutatedText;
}
#endregion
#region transformasi s box
public string sBox_Transform(string text)
{
StringBuilder TransformedText = new StringBuilder(32);
for (int i = 0; i < 8; i++)
{
string temp = text.Substring(i * 6, 6);
TransformedText.Append(this.DoPermutation(temp,
DESData.sBoxes[i]));
}
return TransformedText.ToString();
}
#endregion
#region pemilihan E
public string E_Selection(string Rn_1)
{
string
ExpandedText
=
this.DoPermutation(Rn_1,
DESData.pc_e);
return ExpandedText;
}
#endregion
#region XOR
public string XOR(string text1, string text2)
{
if (text1.Length != text2.Length)
{
Console.WriteLine("Two data blocks for XOR are must
get same size.");
return null;
}

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StringBuilder
StringBuilder(text1.Length);

XORed_Text

=

new

for (int i = 0; i < text1.Length; i++)
{
if (text1[i] != text2[i])
{
XORed_Text.Append("1");
}
else
{
XORed_Text.Append("0");
}
}
return XORed_Text.ToString();
}
#endregion
}
}

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DAFTAR RIWAYAT HIDUP

DATA PRIBADI

Nama Lengkap

: Farid Akbar Siregar

Jenis Kelamin

: Laki-laki

Tempat, Tanggal Lahir

: Medan, 4 April 1994

Alamat

: Jl. Kapodang II No.361 P.Mandala, Medan

Agama

: Islam

E-mail

: farid_akbar_usu@yahoo.com

Pendidikan Terakhir

: Universitas Sumatera Utara Medan, Fakultas Ilmu
Komputer dan Teknologi Informasi Jurusan S1 Ilmu
Komputer

PENDIDIKAN FORMAL

2011 – 2016

: S1 Ilmu Komputer Universitas Sumatera Utara, Medan

2008 – 2011

: SMK Telkom Sandhy Putra Medan

2005 – 2008

: MTsN 2 Medan

1999 – 2005

: MIN Sei Agul Medan

PENGALAMAN ORGANISASI DAN KEGIATAN ILMIAH
 Anggota Departemen Wawasan Kontemporer Ikatan Mahasiswa S1 Ilmu Komputer
(IMILKOM), 2012-2013

 Ketua Komisi Pengawas KPU IMILKOM, 2013

 Ketua Departemen Wawasan Kontemporer Ikatan Mahasiswa S1 Ilmu Komputer
(IMILKOM), 2013-2014

 Ketua Departemen Kemahasiswaan Ikatan Mahasiswa S1 Ilmu Komputer


(IMILKOM), 2013-2014
Praktek Kerja Lapangan Biro Administrasi Pembangunan SETDAPROVSU JuliAgustus 2014

Universitas Sumatera Utara