Perbandingan Algoritma Steganografi echo Data Hiding Dan Low Bit Encoding Dalam Pengamanan File

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LAMPIRAN A : LISTING PROGRAM

1. Form Utama

using System;

using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data;

using System.IO; using System.Text; using System.Threading;

namespace StegoAudio

{ public formStego(){InitializeComponent();}

protected override void Dispose( bool disposing ) {

if( disposing ) {if (components != null) {components.Dispose();}} base.Dispose( disposing ); }

private void OpenFileDialog(FileDialog dialog, TextBox control, bool useFilter) {if (useFilter) {dialog.Filter = "Wave Audio (*.wav)|*.wav";}

if (dialog.ShowDialog(this) == DialogResult.OK) { control.Text = dialog.FileName; }}

private void OpenFileDialog2(OpenFileDialog dlg, TextBox txtKeyFile, bool useFilter)

{if (useFilter)

{dlg.Filter = "File (*.txt)|*.txt";}

if (dlg.ShowDialog(this) == DialogResult.OK) {txtKeyFile.Text = dlg.FileName; }}

private void OpenFileDialog3(OpenFileDialog dlg, TextBox txtMsgFile, bool useFilter)

{if (useFilter)

{dlg.Filter = "File (*.txt)|*.txt";}

if (dlg.ShowDialog(this) == DialogResult.OK) {txtMsgFile.Text = dlg.FileName; }}

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{dialog.Filter = "Wave Audio (*.wav)|*.wav";} if (dialog.ShowDialog(this) == DialogResult.OK)

{control.Text = dialog.FileName; }}

private void Audio_Click(object sender, System.EventArgs e) { OpenFileDialog dlg = new OpenFileDialog();

OpenFileDialog(dlg, txtAudio, true); }

private void StegoAudio_Click(object sender, System.EventArgs e){ SaveFileDialog dlg = new SaveFileDialog();

OpenFileDialog(dlg, txtStegoAudio, true); }

private void KeyFile_Click(object sender, System.EventArgs e) { OpenFileDialog dlg = new OpenFileDialog();

OpenFileDialog2(dlg, txtStegoKey, true); }

private void HideFile_Click(object sender, System.EventArgs e) { OpenFileDialog dlg = new OpenFileDialog();

OpenFileDialog3(dlg, txtHideFile, true); rdoHideFile.Checked = true;}

private void SaveFIle_Click(object sender, System.EventArgs e) { SaveFileDialog dlg = new SaveFileDialog();

OpenFileDialog(dlg, txtHiddenFile, false); rdoHiddenFile.Checked = true;}

private void HideLBE_Click(object sender, System.EventArgs e) { if (rdoAudio.Checked && (txtAudio.Text.Length == 0)){ errorProvider.SetError(txtAudio, "Choose an Audio.");} else if (txtStegoKey.Text.Length == 0){

errorProvider.SetError(txtStegoKey, "Choose a stego key file."); else if (rdoHideFile.Checked && (txtHideFile.Text.Length == 0)){

errorProvider.SetError(txtHideFile, "msg to hide."); }

else if (rdoHidemsg.Checked && (txtHidemsg.Text.Length == 0)) { errorProvider.SetError(txtHidemsg, "msg to hide."); }

else if (txtStegoAudio.Text.Length == 0) {

errorProvider.SetError(txtStegoAudio, "Save Stego Audio with new name."); }

else{

var watch = System.Diagnostics.Stopwatch.StartNew(); Stream carrierStream = null;

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Stream msgStream = GetmsgStream();

Stream StegoKeyStream = new FileStream(txtStegoKey.Text, FileMode. Open);

try{

long samplesRequired = LBE.CheckKeyForMsg(StegoKeyStream,msgStream. Length);

if (samplesRequired > Int32.MaxValue) {

throw new Exception("Requires " + samplesRequired + " samples, only " +Int32.MaxValue + " samples are allowed."); }

if (rdoAudio.Checked) {

carrierStream = new FileStream(txtAudio.Text, FileMode.Open); } else{ formRecorder recorder = new formRecorder(samplesRequired);

recorder.ShowDialog(this);

carrierStream = recorder.RecordedStream; } this.Cursor = Cursors.WaitCursor;

stegoStream = new FileStream(txtStegoAudio.Text, FileMode.Create); audioStream = new WaveStream(carrierStream, stegoStream);

if (audioStream.Length <= 0) {

throw new Exception("Invalid WAV file");} if (samplesRequired > audioStream.CountSamples) {

MessageBox.Show("File carrier too small\r\n" + "Samples available: " + audioStream.CountSamples + "\r\n" + "Samples needed: " +

samplesRequired + "\r\n" + "\r\n" + "Click OK to record a new sound...." + "\r\n");

formRecorder recorder = new formRecorder(samplesRequired); recorder.ShowDialog(this);

carrierStream = recorder.RecordedStream; }

this.Cursor = Cursors.WaitCursor;

LBE combine = new LBE(audioStream, stegoStream); combine.Hide(msgStream, StegoKeyStream);

watch.Stop();

var elapsedMs = watch.ElapsedMilliseconds;

txtTime.Text = Convert.ToString(elapsedMs +" ms"); MessageBox.Show("Hiding Success");}

catch(Exception ex) {

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MessageBox.Show(ex.Message);}

finally {

if(StegoKeyStream != null){ StegoKeyStream.Close(); } if(msgStream != null){ msgStream.Close(); } if(audioStream != null){ audioStream.Close(); } if(carrierStream != null){ carrierStream.Close(); } if(stegoStream != null){ stegoStream.Close(); }

this.Cursor = Cursors.Default;} }}

private void ExtractLBE_Click(object sender, EventArgs e) { if (txtAudio.Text.Length == 0)

{errorProvider.SetError(txtAudio, "Choose Stego Audio.");} else if (txtStegoKey.Text.Length == 0)

{errorProvider.SetError(txtStegoKey, "Choose a stego key file."); } else

{ var watch = System.Diagnostics.Stopwatch.StartNew(); Stream carrierStream = null;

FileStream stegoStream = null; WaveStream audioStream = null; Stream msgStream = GetmsgStream();

Stream StegoKeyStream = new FileStream(txtStegoKey.Text, FileMode.Open);

try

{long samplesRequired = LBE.CheckKeyFormsg(StegoKeyStream, msgStream.Length);

if (samplesRequired > Int32.MaxValue) {

throw new Exception("Requires " + samplesRequired + " samples, only " + Int32.MaxValue + " samples available.");}

if (rdoAudio.Checked)

{carrierStream = new FileStream(txtAudio.Text, FileMode.Open); } else{

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this.Cursor = Cursors.WaitCursor;

stegoStream = new FileStream(txtStegoAudio.Text, FileMode.Create);

audioStream = new WaveStream(carrierStream, stegoStream); if (audioStream.Length <= 0)

{throw new Exception("Invalid WAV file");} if (samplesRequired > audioStream.CountSamples) {MessageBox.Show("File carrier too small\r\n"

+ "Samples available: " + audioStream.CountSamples + "\r\n" + "Samples needed: " + samplesRequired + "\r\n" + "\r\n" + "Click OK to record a new sound...." + "\r\n");

carrierStream = recorder.RecordedStream; } this.Cursor = Cursors.WaitCursor;

LBE combine = new LBE (audioStream, stegoStream); combine.embed(msgStream, StegoKeyStream);

watch.Stop();

var elapsedMs = watch.ElapsedMilliseconds;

txtTime.Text = Convert.ToString(elapsedMs + " ms"); MessageBox.Show("Hiding Success");}

catch (Exception ex) {

this.Cursor = Cursors.Default; Console.WriteLine(ex);

MessageBox.Show(ex.Message); }

2. Sisip

//LBE

finally{

if (StegoKeyStream != null) { StegoKeyStream.Close(); } if (msgStream != null) {

msgStream.Close(); } if (audioStream != null) {

audioStream.Close(); } if (carrierStream != null) {

carrierStream.Close(); } if (stegoStream != null) {

stegoStream.Close(); }

this.Cursor = Cursors.Default; }}}

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byte msg, bit, audioByte; int msgBuffer;

int keyByte;

while ((msgBuffer = msgStream.ReadByte()) >= 0) { msg = (byte)msgBuffer;

for (int msgIndex = 0; msgIndex < 8; msgIndex++) {keyByte = GetKeyValue(StegoKeyStream);

for (int n = 0; n < keyByte - 1; n++){

carrierStream.Copy(audioBuffer, 0, audioBuffer.Length, stegoStream); } carrierStream.Read(audioBuffer, 0, audioBuffer.Length);

audioByte = audioBuffer[bytesPerSample - 1];

bit = (byte)(((msg & (byte)(1 << msgIndex)) > 0) ? 1 : 0);

for (int pattern = 4; pattern >= 1; pattern--){

if ((bit == 1) && ((audioByte % pattern) == 0)) {audioByte += 1; } else if ((bit == 0) && ((audioByte % pattern) == 1)) {audioByte -= 1; }}

audioBuffer[bytesPerSample - 1] = audioByte;

stegoStream.Write(audioBuffer, 0, bytesPerSample); }}

audioBuffer = new byte[carrierStream.Length - carrierStream.Position]; carrierStream.Read(audioBuffer, 0, audioBuffer.Length);

stegoStream.Write(audioBuffer, 0, audioBuffer.Length); }

public void Extract(Stream msgStream, Stream StegoKeyStream){ byte[] audioBuffer = new byte[bytesPerSample];

byte msg, bit, audioByte; int msgLength = 0; int keyByte;

while( (msgLength==0 || msgStream.Length<msgLength) ){ msg = 0;

for(int msgIndex=0; msgIndex<8; msgIndex++){ keyByte = GetKeyValue(StegoKeyStream); for(int n=0; n<keyByte-1; n++){

carrierStream.Read(audioBuffer, 0, audioBuffer.Length);} carrierStream.Read(audioBuffer, 0, audioBuffer.Length); audioByte = audioBuffer[bytesPerSample-1];

bit = (byte)(((audioByte % pattern) == 0) ? 0 : 1); msg += (byte)(bit << msgIndex); }}

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if(msgLength==0 && msgStream.Length==4){ msgStream.Seek(0, SeekOrigin.Begin);

msgLength = new BinaryReader(msgStream).ReadInt32(); msgStream.Seek(0, SeekOrigin.Begin);

msgStream.SetLength(0); }}}

//EDH

public void embed(Stream msgStream, Stream StegoKeyStream) { byte[] audioBuffer = new byte[bytesPerSample];

byte message, bit, mixer; int msgBuffer;

int keyByte;

while ((msgBuffer = msgStream.ReadByte()) >= 0) { message = (byte)msgBuffer;

for (int messageIndex = 0; messageIndex < 8; messageIndex++){ keyByte = GetKeyValue(StegoKeyStream);

carrierStream.Copy(audioBuffer, 0, audioBuffer.Length, stegoStream);}

carrierStream.Read(audioBuffer, 0, audioBuffer.Length); mixer = audioBuffer[bytesPerSample - 1];

byte kernel = mixer;

bit = (byte)(((message & (byte)(1 << messageIndex)) > 0) ? 1 : 0); if ((bit == 1) && ((mixer % 2) == 0) && ((kernel % 2) == 0)) {

mixer += 1; }

else if ((bit == 0) && ((mixer % 2) == 1) && ((kernel % 2) == 1)) { mixer -= 1; } audioBuffer[bytesPerSample - 1] =

mixer; stegoStream.Write(audioBuffer, 0, bytesPerSample); }}

audioBuffer = new byte[carrierStream.Length - carrierStream.Position]; carrierStream.Read(audioBuffer, 0, audioBuffer.Length);

stegoStream.Write(audioBuffer, 0, audioBuffer.Length); }

3. Ekstrak

//LBE

public void Extract(Stream msgStream, Stream StegoKeyStream){ byte[] audioBuffer = new byte[bytesPerSample];

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while( (msgLength==0 || msgStream.Length<msgLength) ){ msg = 0;

for(int msgIndex=0; msgIndex<8; msgIndex++){ keyByte = GetKeyValue(StegoKeyStream); for(int n=0; n<keyByte-1; n++){

carrierStream.Read(audioBuffer, 0, audioBuffer.Length) } carrierStream.Read(audioBuffer, 0, audioBuffer.Length); audioByte = audioBuffer[bytesPerSample-1];

bit = (byte)(((audioByte % pattern) == 0) ? 0 : 1); msg += (byte)(bit << msgIndex); }}

msgStream.WriteByte(msg);

if(msgLength==0 && msgStream.Length==4){ msgStream.Seek(0, SeekOrigin.Begin);

msgLength = new BinaryReader(msgStream).ReadInt32(); msgStream.Seek(0, SeekOrigin.Begin);

msgStream.SetLength(0); }}}

//EDH

public void Extract(Stream msgStream, Stream StegoKeyStream) {byte[] audioBuffer = new byte[bytesPerSample];

byte message, bit, mixer; int messageLength = 0; int keyByte;

while ((messageLength == 0 || msgStream.Length < messageLength)) { message = 0;

for (int messageIndex = 0; messageIndex < 8; messageIndex++){ keyByte = GetKeyValue(StegoKeyStream);

carrierStream.Read(audioBuffer, 0, audioBuffer.Length); } carrierStream.Read(audioBuffer, 0, audioBuffer.Length); mixer = audioBuffer[bytesPerSample - 1];

byte kernel = mixer;

bit = (byte)(((mixer % 2) == 0 && (kernel % 2 == 0)) ? 0 : 1); message += (byte)(bit << messageIndex); }

msgStream.WriteByte(message);

if (messageLength == 0 && msgStream.Length == 4) { msgStream.Seek(0, SeekOrigin.Begin);

messageLength = new BinaryReader(msgStream).ReadInt32(); msgStream.Seek(0, SeekOrigin.Begin);

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CURRICULUM VITAE

1. Biodata

Nama : Melly

Alamat Sekarang : Jl. H.Misbah Komplek Multatuli Blok D No 16,Medan, Sumatera Utara

Alamat Orang Tua : Jl. Dalil Tani II Gg Jahe No 7, Pematangsiantar, Sumater Utara Telp / HP : 087892094066

Email : [email protected]

2. Riwayat Pendidikan

1999 – 2000 : TK Swasta Methodist Pematangsiantar 2000 – 2007 : SD Swasta Methodist Pematangsiantar 2007 – 2010 : SMP Swasta Methodist Pematangsiantar 2010 – 2013 : SMA Swasta Methodist Pematangsiantar

2013 – Sekarang : Universitas Sumatera Utara (FasilkomTI –Ilmu Komputer)

3. Keahlian

Programming : C# , Visual Basic Database : MySQL.

Software : Ms. Office, Microsoft Visual Studio, Notepad++, Sharp Develop, Eclipse.

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4. Pelatihan

[2015] Nation Building dari Djarum Foundation di Semarang , Indonesia. [2015] Character Building dari Djarum Foundation di Bandung, Indonesia. [2016] Leadership Development dari Djarum Foundation di Jakarta, Indonesia. 5. Seminar dan Workshop

[2013] Seminar Gelora Literasi Teknologi Informasi dan Komunikasi “Si GELITIK” [2013] Seminar What Will You Be?

[2014] Seminar Nasional Literasi Informasi (SENARAI)

[2014] Seminar Campus Marketeers Club - Effective Market Segmentation and Targeting

[2014] Seminar Young People of Character - The Hope of the Future [2015] Seminar Entrepreneurship Elevator to Success

[2015] Workshop Object Oriented Programming

Medan, Juni 2017 Hormat Saya,