Pengamanan File Citra Dengan Skema Hybrid Cryptosystem Menggunakan Algoritma RSA-CRT Dan Algoritma Affine Cipher

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LISTING PROGRAM

Form Pembangkit Kunci using System;

using System.Collections.Generic;

using System.Drawing;

using System.IO;

using System.Windows.Forms;

namespace affine_cipher_dan_rsa_crt

{

/// <summary>

/// Description of Pembangkit_kunci.

/// </summary>

public partial class Pembangkit_kunci : Form

{

int p,q,n,totien,dp,dq;

double qinv;

// List<int> d22 = new List<int>();

// List<int> d11 = new List<int>();

Random r = new Random();

public Pembangkit_kunci()

{

//

// The InitializeComponent() call is required for Windows

Forms designer support.

//

InitializeComponent();

//

// TODO: Add constructor code after the

InitializeComponent() call.

//

}

void GroupBox1Enter(object sender, EventArgs e)

{

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}

void HomeToolStripMenuItemClick(object sender, EventArgs e)

{

MainForm pilih = new MainForm();

pilih.Show();

this.Hide();

}

void EnkripsiToolStripMenuItemClick(object sender, EventArgs

e)

{

ENKRIPSI pilih = new ENKRIPSI();

pilih.Show();

this.Hide();

}

void DekripsiToolStripMenuItemClick(object sender, EventArgs

e)

{

Dekripsi pilih = new Dekripsi();

pilih.Show();

this.Hide();

}

public int GCD(int a, int b)

{

int Remainder;

while( b != 0 )

{

Remainder = a % b;

a = b;

b = Remainder;

}

return a;

}

public UInt64 sma(UInt64 x, UInt64 H, UInt64 n)

{

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int[] bin = new int[32];

int i;

r = x;

i = 0;

/* ubah H ke Biner */

while( H > 0 )

{

if (H % 2 == 0)

{

bin[i] = 0;

}

else

{

bin[i] = 1;

}

H = H/2;

i++;

}

i--;

while(i>0)

{

r = (r * r) % n;

if( bin[--i] == 1 )

{

r = (r * x) % n;

}

return r;

}

public int lehmann(int n)

{

int a = 0,i = 0;

UInt64 l;

for(i=1;i<=2;i++)

{

a = r.Next(2,n-1);

l = sma(Convert.ToUInt64(a),Convert.ToUInt64

(((n-1)/2)),Convert.ToUInt64(n));

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{

break;

}

if(i == 2 && (n%2!=0 && n%5!=0 && n%3!=0 && n%7!=0))

return n;

else

return lehmann(r.Next(100,1000));

}

double dd=0;

void Button1Click(object sender, EventArgs e)

{

p = 0;

q = 0;

n = 0;

totien = 0;

cari :

p = lehmann(r.Next(100,1000));

q = lehmann(r.Next(100,1000));

if (p == q)

{

goto cari;

}

n = p*q;

totien = (p-1)*(q-1);

double e_double=0;

for (int i = 2; i <totien; i++) {

int gcd = GCD(i, totien);

if (gcd==1) {

e_double = i;

break;

}

for (int k = 2; k < totien; k++) {

double d_Int= (1+(k*totien))/e_double;

double cek_d = Math.Round(d_Int);

if (cek_d == d_Int) {

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break;

}

dp = Convert.ToInt32(dd) % (p-1);

dq = Convert.ToInt32(dd) % (q-1);

for (int k1 = 2; k1 < totien; k1++) {

double q_Int= (double)(1+(k1*p))/q;

String cek = q_Int.ToString();

double cek_q = Math.Round(q_Int);

if (cek_q == q_Int) {

qinv = q_Int;

break;

}

textBox1.Text = p.ToString();

textBox2.Text = q.ToString();

textBox3.Text = dp.ToString();

textBox4.Text = dq.ToString();

textBox5.Text = qinv.ToString();

textBox6.Text = e_double.ToString();

textBox7.Text = n.ToString();

}

void Button2Click(object sender, EventArgs e)

{

SaveFileDialog simpankunci = new SaveFileDialog();

simpankunci.Filter = "key Files|*.privatrsa-crt";

simpankunci.FileName = "*.privatrsa-crt";

if (simpankunci.ShowDialog() == DialogResult.OK)

{

FileStream

fstream=new FileStream(simpankunci.FileName,FileMode.OpenOrCreate);

StreamWriter sw = new StreamWriter(fstream);

SeekOrigin seekorigin = new SeekOrigin();

sw.BaseStream.Seek(0, seekorigin);

sw.WriteLine(textBox1.Text);

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sw.Flush();

sw.Close();

}

simpankunci.Filter = "key Files|*.publikrsa-crt";

simpankunci.FileName = "*.publikrsa-crt";

if (simpankunci.ShowDialog() == DialogResult.OK)

{

FileStream

fstream=new FileStream(simpankunci.FileName,FileMode.OpenOrCreate);

StreamWriter sw = new StreamWriter(fstream);

SeekOrigin seekorigin = new SeekOrigin();

sw.BaseStream.Seek(0, seekorigin);

MessageBox.Show("kunci berhasil disimpan");

sw.Flush();

sw.Close();

}

Form Enkripsi using System;

using System.Diagnostics;

using System.Drawing.Imaging;

namespace affine_cipher_dan_rsa_crt {

/// <summary>

/// Description of ENKRIPSI. /// </summary>

public partial class ENKRIPSI : Form {

int ee,n,m,b; Bitmap gambarasli;

string cpherkey1,cpherkey2; string tipe;

public ENKRIPSI() {

//

// The InitializeComponent() call is required for Windows Forms designer support.

//

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//

// TODO: Add constructor code after the InitializeComponent() call.

// }

void HomeToolStripMenuItemClick(object sender, EventArgs e) {

MainForm pilih = new MainForm(); pilih.Show();

this.Hide(); }

void PembangkitKunciToolStripMenuItemClick(object sender, Even tArgs e)

{

Pembangkit_kunci pilih = new Pembangkit_kunci(); pilih.Show();

this.Hide(); }

void DekripsiToolStripMenuItemClick(object sender, EventArgs e)

{

Dekripsi pilih = new Dekripsi(); pilih.Show();

this.Hide(); }

public int GCD(int a, int b) {

int Remainder; while( b != 0 ) {

Remainder = a % b; a = b;

b = Remainder; }

return a; }

int x,y;

void bangkitkunciaffine(){ Random ran = new Random(); ulangx :

x= ran.Next(255);

int gcdx = GCD(x, 256); if (gcdx==1) {

ulangy :

y= ran.Next(255); int gcdy = GCD(x, y); if (gcdy==1)

{

bilanganM.Text=x.ToString(); bilanganB.Text=y.ToString(); }

else

{

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} else {

goto ulangx; }

}

void BangkitKunciClick(object sender, EventArgs e) {

bangkitkunciaffine(); }

int red,blue,green;

void EnkripsiCitraClick(object sender, EventArgs e) {

Stopwatch q = new Stopwatch(); q.Start();

m = Convert.ToInt32(bilanganM.Text); b = Convert.ToInt32(bilanganB.Text);

for (int j = 0; j <= gambarasli.Height-1; j++) {

for (int i = 0; i <= gambarasli.Width-1; i++) {

red = (m*gambarasli.GetPixel(i,j).R +b)%256; green = (m*gambarasli.GetPixel(i,j).G +b)%256; blue = (m*gambarasli.GetPixel(i,j).B +b)%256; gambarasli.SetPixel(i,j,Color.FromArgb(red,green,b lue));

}

gambar2.Image= gambarasli; gambar2.Refresh(); }

q.Stop();

string timersa =

Math.Round(Convert.ToDecimal(q.Elapsed.TotalMilliseconds)).ToString(); running.Text= timersa;

EnkripsiCitra.Enabled=false; }

public int modexp(int x, int y, int n) {

int z = 1;

for (int i = 0; i < y ; i++){ z = (x * z) %n;

}

return z; }

void EnkripsiKunciClick(object sender, EventArgs e) {

n = Convert.ToInt32(bilanganN.Text); ee = Convert.ToInt32(bilanganE.Text); cpherkey1

= modexp(Convert.ToInt32(bilanganM.Text),ee,n).ToString(); cpherkey2

= modexp(Convert.ToInt32(bilanganB.Text),ee,n).ToString(); cipherkey.Text =cpherkey1;

cipherkey2.Text=cpherkey2; }

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void CariGambarClick(object sender, EventArgs e) {

OpenFileDialog ofd = new OpenFileDialog(); ofd.InitialDirectory = @"D:\";

ofd.Title = "Browse Image File"; ofd.CheckFileExists = true; ofd.DefaultExt = "bmp";

ofd.Filter = "image files| *.bmp; *.jpg; "; ofd.RestoreDirectory = true;

ofd.ReadOnlyChecked = true; ofd.ShowReadOnly = true;

if (ofd.ShowDialog() == DialogResult.OK) {

gambarasli=new Bitmap(ofd.FileName); gambar.Image = new Bitmap(gambarasli);

gambar.SizeMode = PictureBoxSizeMode.StretchImage; EnkripsiCitra.Enabled=true;

} }

void SimpanGambarClick(object sender, EventArgs e) {

SaveFileDialog save = new SaveFileDialog(); save.Filter = "Image Files(*.bmp) | *.bmp"; if (save.ShowDialog() == DialogResult.OK) {

gambar2.Image.Save(save.FileName, System.Drawing.Imaging.I mageFormat.Bmp);

MessageBox.Show("Gambar tersimpan"); }

}

void ImportKunciClick(object sender, EventArgs e) {

OpenFileDialog dialog = new OpenFileDialog();

dialog.Filter = "key Files( *.publikrsa-crt)|*.publikrsa-crt";

dialog.Title = "Open File : "; dialog.RestoreDirectory = true;

if (dialog.ShowDialog() == DialogResult.OK) {

tipe =

dialog.FileName.Substring(dialog.FileName.Length - 13, 13); if (tipe == "publikrsa-crt")

{

string[] lines = File.ReadAllLines(dialog.FileName);

bilanganE.Text = lines[0]; bilanganN.Text = lines[1]; }

} }

void SimpanKunciClick(object sender, EventArgs e) {

SaveFileDialog simpan = new SaveFileDialog();

simpan.Filter = "key Files( *.cipherkey)|*.cipherkey"; simpan.FileName = "*.cipherkey";

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{

FileStream

fstream=new FileStream(simpan.FileName,FileMode.OpenOrCreate); StreamWriter sw = new StreamWriter(fstream); SeekOrigin seekorigin = new SeekOrigin(); sw.BaseStream.Seek(0, seekorigin);

sw.WriteLine(cipherkey.Text); sw.WriteLine(cipherkey2.Text);

MessageBox.Show("cipherkey tersimpan"); sw.Flush();

sw.Close(); } }

} }

Form Dekripsi using System;

using System.Diagnostics;

namespace affine_cipher_dan_rsa_crt {

/// <summary>

/// Description of Dekripsi. /// </summary>

public partial class Dekripsi : Form {

int m,b;

Bitmap gambarasli; string tipe;

public Dekripsi() {

//

// The InitializeComponent() call is required for Windows Forms designer support.

//

InitializeComponent();

//

// TODO: Add constructor code after the InitializeComponent() call.

// }

void HomeToolStripMenuItemClick(object sender, EventArgs e) {

MainForm pilih = new MainForm(); pilih.Show();

this.Hide(); }

void PemabangkitKunciToolStripMenuItemClick(object sender, Eve ntArgs e)

{

Pembangkit_kunci pilih = new Pembangkit_kunci(); pilih.Show();

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}

void EnkripsiToolStripMenuItemClick(object sender, EventArgs e)

{

ENKRIPSI pilih = new ENKRIPSI(); pilih.Show();

this.Hide(); }

int m1,red,blue,green;

void DekripsiCitraClick(object sender, EventArgs e) {

Stopwatch q = new Stopwatch(); q.Start();

m = Convert.ToInt32(bilanganM.Text); b = Convert.ToInt32(bilanganB.Text); for (int a = 0; a <= 256; a++) { int inv =(a*m) % 256 ;

if (inv == 1){ m1 = a; }

}

for (int j = 0; j <= gambarasli.Height-1; j++) {

for (int i = 0; i <= gambarasli.Width-1; i++) {

red = (m1*(gambarasli.GetPixel(i,j).R - b))%256; green = (m1*(gambarasli.GetPixel(i,j).G

b))%256 ;

blue = (m1*(gambarasli.GetPixel(i,j).B - b))%256; if (red < 0) {

red = red + 256; }

if (green < 0) {

green = green + 256; }

if (blue < 0) {

blue = blue + 256; }

gambarasli.SetPixel(i,j,Color.FromArgb(red,green,b lue));

}

pictureBox2.Image= gambarasli; pictureBox2.Refresh();

}

q.Stop();

string timersa =

Math.Round(Convert.ToDecimal(q.Elapsed.TotalMilliseconds)).ToString(); runing.Text=timersa;

dekripsiCitra.Enabled=false; }

public int modexp(int x, int y, int n) {

int z = 1;

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}

return z; }

void DekripsiKunciClick(object sender, EventArgs e) {

int c1 = Convert.ToInt32(bilanganCipherkey.Text); int c2 = Convert.ToInt32(bilangancipherkey2.Text);

int m1c1

= modexp(c1,Convert.ToInt32(bilanganDP.Text),Convert.ToInt32(bilanganP .Text));

int m2c1

= modexp(c1,Convert.ToInt32(bilanganDQ.Text),Convert.ToInt32(bilanganQ .Text));

int m1c2

= modexp(c2,Convert.ToInt32(bilanganDP.Text),Convert.ToInt32(bilanganP .Text));

int m2c2

= modexp(c2,Convert.ToInt32(bilanganDQ.Text),Convert.ToInt32(bilanganQ .Text));

int h1 = Convert.ToInt32 (bilanganQINV.Text)*(m1c1-m2c1) % Convert.ToInt32(bilanganP.Text);

int h2 = Convert.ToInt32 (bilanganQINV.Text)*(m1c2-m2c2) % Convert.ToInt32(bilanganP.Text);

int p1= m2c1 + (h1 * Convert.ToInt32(bilanganQ.Text)); int p2= m2c2 + (h2 * Convert.ToInt32(bilanganQ.Text));

bilanganM.Text = p1.ToString(); bilanganB.Text = p2.ToString(); }

void CariGambarrClick(object sender, EventArgs e) {

OpenFileDialog ofd1 = new OpenFileDialog ofd1.InitialDirectory = @"D:\";

ofd1.Title = "Browse Image File"; ofd1.CheckFileExists = true

ofd1.DefaultExt = "bmp";

ofd1.Filter = "image files|*.bmp;"; ofd1.RestoreDirectory = true;

ofd1.ReadOnlyChecked = true ofd1.ShowReadOnly = true

if (ofd1.ShowDialog() == DialogResult.OK) {

gambarasli=new Bitmap(ofd1.FileName);

pictureBox1.Image = new Bitmap(gambarasli); pictureBox1.SizeMode =

PictureBoxSizeMode.StretchImage;

dekripsiCitra.Enabled=true; }

}

void ImportChiperkeyClick(object sender, EventArgs e) {

OpenFileDialog dialog = new OpenFileDialog(); dialog.Filter = "Encrypted Files(

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tipe =

dialog.FileName.Substring(dialog.FileName.Length - 9, 9); if (tipe == "cipherkey")

{

bilanganCipherkey.Text = lines[0]; bilangancipherkey2.Text = lines[1]; }

} }

void ImportPrivateClick(object sender, EventArgs e) {

OpenFileDialog dialog = new OpenFileDialog();

dialog.Filter = "key Files( *.privatrsa-crt)|*.privatrsa-crt";

tipe =

dialog.FileName.Substring(dialog.FileName.Length - 13, 13); if (tipe == "privatrsa-crt")

{

bilanganP.Text = lines[0]; bilanganQ.Text = lines[1]; bilanganDP.Text = lines[2]; bilanganDQ.Text = lines[3];

bilanganQINV.Text = lines[4]; }

} }

void SimpangambarClick(object sender, EventArgs e) {

SaveFileDialog save = new SaveFileDialog(); save.Filter = "Image Files(*.bmp) | *.bmp"; if (save.ShowDialog() == DialogResult.OK) {

pictureBox2.Image.Save(save.FileName, System.Drawing.Imagi ng.ImageFormat.Bmp);

MessageBox.Show("Gambar tersimpan"); }

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D

AFTAR

R

IWAYAT

H

IDUP

C

URRICULUM

V

ITAE

I.

D

ATA

P

RIBADI

/

Personal Identification

Nama

Lengkap

: Agum Gumelar

Tempat/

Tgl. Lahir

: P.siantar / 31 Maret 1996

Jenis

Kelamin

: Laki-laki

Agama

: Islam

Kebangsaan : Indonesia

Alamat

: Jalan Enggang No 12 BLK,

P.siantar, Sumatera Utara,

Indonesia 21114

HP

: +6287868436297

Email

: agumgumelar836@yahoo.com

II. K

EMAMPUAN

/

Capabilities

Bahasa

: Bahasa Indonesia, Bahasa Inggris

Bahasa Pemrograman : C#, C++, PHP

Database

: MySQL

Lainnya

: HTML, Ms. Office

III. P

ENDIDIKAN

F

ORMAL

/

Formal Education



[ 2013

–

2017 ] S1 Ilmu Komputer, Fakultas Ilmu Komputer dan Teknologi

Informasi Universitas Sumatera Utara



[ 2010

–

2013 ] SMA Negeri 4 Pematangsiantar



[ 2007

–

2010 ] SMP Negeri 4 Pematangsiantar



[ 2001

–

2007 ] SD Swasta YPHI Pematangsiantar

IV. P

ENDIDIKAN

N

ON

-

FORMAL

/

Informal Education

(15)

V. P

ELATIHAN DAN

S

EMINAR

/

Trainings & Workshop

1)

Peserta Seminar Nasional “Melalui Inovasi Teknologi untuk Menciptakan

Mahasiswa Kreatif dan Mandiri”,

Universitas Sumatera Utara [2017]

2)

Peserta Workshop “Bank Indonesia Goes To Campus Bersama NET.”,

Universitas Sumatera Utara [2016]

3)

Peserta acara Kampus Kompas TV, Universitas Sumatera Utara [2016]

4)

Peserta Kuliah Umum Entrepreneurdhip & Pengembangan Wirausaha Muda

2015

dengan tema “

Membangun Ekonomi Indonesia Menghadapi

Persaingan Ekonomi Global

”, Universitas Sumatera Utara

[2015]

5)

Peserta Seminar

“What Will You Be?” IMILKOM Universitas Sumatera

Utara [2013]

6)