Implementasi Kombinasi Tiny Encryption Algorithm (TEA) Dan Algoritma Least Significant Bit(LSB)Untuk Keamanan File Text

  Public Class Form1 Inherits System.Windows.Forms.Form Dim gambar As Bitmap Dim PbAs Integer Dim Pc As Integer Dim rt, vM, vH, vB As Integer Dim kataku(200) As String Friend WithEventsbtnAmbil As System.Windows.Forms.Button Friend WithEvents Pic2 AsSystem.Windows.Forms.PictureBox Friend WithEvents Button1 AsSystem.Windows.Forms.Button Friend WithEvents Kata AsSystem.Windows.Forms.TextBox Friend WithEvents ToolStripMenuItem1

  AsSystem.Windows.Forms.ToolStripSeparator Friend

  WithEventsFileToolStripMenuItemAsSystem.Windows.Forms.ToolStripMe nuItem Friend WithEvents Pic1 AsSystem.Windows.Forms.PictureBox Friend WithEvents SFD AsSystem.Windows.Forms.SaveFileDialog Friend WithEvents MenuStrip1 AsSystem.Windows.Forms.MenuStrip Friend WithEvents GroupBox1 AsSystem.Windows.Forms.GroupBox Friend WithEvents K3 AsSystem.Windows.Forms.TextBox Friend WithEvents K1 AsSystem.Windows.Forms.TextBox Friend WithEventsxkata As System.Windows.Forms.Label Friend WithEvents K2 AsSystem.Windows.Forms.TextBox Friend WithEventsxjumlah As System.Windows.Forms.Label Friend WithEvents Button3 AsSystem.Windows.Forms.Button Friend WithEvents Button4 AsSystem.Windows.Forms.Button Friend WithEvents Button5 AsSystem.Windows.Forms.Button Friend WithEvents Label2 AsSystem.Windows.Forms.Label Friend WithEvents Button6 AsSystem.Windows.Forms.Button Friend WithEvents Button7 AsSystem.Windows.Forms.Button Friend WithEvents Button8 AsSystem.Windows.Forms.Button Friend WithEventstk As System.Windows.Forms.TextBox Friend WithEvents OFD AsSystem.Windows.Forms.OpenFileDialog Public Sub New() MyBase.New() InitializeComponent() End Sub If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub Private components As System.ComponentModel.IContainer Friend WithEventskeyLabel As System.Windows.Forms.Label Friend WithEventskeyTextBox As System.Windows.Forms.TextBox Friend WithEventsDataLabelAsSystem.Windows.Forms.Label Friend WithEventsencryptButton As System.Windows.Forms.Button Friend WithEvents Label1 AsSystem.Windows.Forms.Label Friend WithEventsDataTextBoxAsSystem.Windows.Forms.TextBox Friend WithEventstxtchiper As System.Windows.Forms.TextBox <System.Diagnostics.DebuggerStepThrough()> Private Sub

  InitializeComponent() Me.keyLabel = New System.Windows.Forms.Label() Me.keyTextBox = New System.Windows.Forms.TextBox() Me.DataLabel = New System.Windows.Forms.Label() Me.encryptButton = New System.Windows.Forms.Button() Me.Label1 = New System.Windows.Forms.Label() Me.DataTextBox = New System.Windows.Forms.TextBox() Me.txtchiper = New System.Windows.Forms.TextBox() Me.btnAmbil = New System.Windows.Forms.Button() Me.Pic2 = New System.Windows.Forms.PictureBox() Me.Kata = New System.Windows.Forms.TextBox() Me.ToolStripMenuItem1 = New

  System.Windows.Forms.ToolStripSeparator() Me.FileToolStripMenuItem = New

  System.Windows.Forms.ToolStripMenuItem() Me.Pic1 = New System.Windows.Forms.PictureBox() Me.SFD = New System.Windows.Forms.SaveFileDialog() Me.MenuStrip1 = New System.Windows.Forms.MenuStrip() Me.OFD = New System.Windows.Forms.OpenFileDialog() Me.GroupBox1 = New System.Windows.Forms.GroupBox() Me.tk = New System.Windows.Forms.TextBox() Me.K3 = New System.Windows.Forms.TextBox() Me.K1 = New System.Windows.Forms.TextBox() Me.xkata = New System.Windows.Forms.Label() Me.K2 = New System.Windows.Forms.TextBox() Me.xjumlah = New System.Windows.Forms.Label() Me.Button3 = New System.Windows.Forms.Button() Me.Button4 = New System.Windows.Forms.Button() Me.Button5 = New System.Windows.Forms.Button() Me.Label2 = New System.Windows.Forms.Label() Me.Button6 = New System.Windows.Forms.Button() Me.Button7 = New System.Windows.Forms.Button() Me.Button8 = New System.Windows.Forms.Button() Me.Button9 = New System.Windows.Forms.Button() CType(Me.Pic2, System.ComponentModel.ISupportInitialize).BeginInit() CType(Me.Pic1, System.ComponentModel.ISupportInitialize).BeginInit() Me.MenuStrip1.SuspendLayout() Me.GroupBox1.SuspendLayout() Me.SuspendLayout() ' 'keyLabel ' Me.keyLabel.Location = New System.Drawing.Point(42, 24) Me.keyLabel.Name = "keyLabel" Me.keyLabel.Size = New System.Drawing.Size(32, 24) Me.keyLabel.TabIndex = 0 Me.keyLabel.Text = "Key" Me.keyLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter '

  ' Me.keyTextBox.Location = New System.Drawing.Point(80, 28) Me.keyTextBox.MaxLength = 16 Me.keyTextBox.Name = "keyTextBox" Me.keyTextBox.Size = New System.Drawing.Size(104, 20) Me.keyTextBox.TabIndex = 1 Me.keyTextBox.Text = "12345678" ' 'DataLabel ' Me.DataLabel.Location = New System.Drawing.Point(37, 69) Me.DataLabel.Name = "DataLabel" Me.DataLabel.Size = New System.Drawing.Size(88, 16) Me.DataLabel.TabIndex = 2 Me.DataLabel.Text = "Plaintext" ' 'encryptButton ' Me.encryptButton.Location = New System.Drawing.Point(40, 318) Me.encryptButton.Name = "encryptButton" Me.encryptButton.Size = New System.Drawing.Size(72, 28) Me.encryptButton.TabIndex = 4 Me.encryptButton.Text = "Encrypt" ' 'Label1 ' Me.Label1.AutoSize = True Me.Label1.Location = New System.Drawing.Point(42, 209) Me.Label1.Name = "Label1" Me.Label1.Size = New System.Drawing.Size(54, 13) Me.Label1.TabIndex = 6 Me.Label1.Text = "Chipertext" ' 'DataTextBox ' Me.DataTextBox.Location = New System.Drawing.Point(40, 88) Me.DataTextBox.Multiline = True Me.DataTextBox.Name = "DataTextBox" Me.DataTextBox.Size = New System.Drawing.Size(248, 75)

  ' 'txtchiper ' Me.txtchiper.Location = New System.Drawing.Point(40, 234) Me.txtchiper.Multiline = True Me.txtchiper.Name = "txtchiper" Me.txtchiper.Size = New System.Drawing.Size(248, 78) Me.txtchiper.TabIndex = 7 ' 'btnAmbil ' Me.btnAmbil.Location = New System.Drawing.Point(431, 473) Me.btnAmbil.Name = "btnAmbil" Me.btnAmbil.Size = New System.Drawing.Size(117, 29) Me.btnAmbil.TabIndex = 22 Me.btnAmbil.Text = "AMBIL INFORMASI" Me.btnAmbil.UseVisualStyleBackColor = True ' 'Pic2 ' Me.Pic2.Location = New System.Drawing.Point(558, 58) Me.Pic2.Name = "Pic2" Me.Pic2.Size = New System.Drawing.Size(242, 248) Me.Pic2.SizeMode =

  System.Windows.Forms.PictureBoxSizeMode.StretchImage Me.Pic2.TabIndex = 21 Me.Pic2.TabStop = False ' 'Button1 ' Me.Button1.Location = New System.Drawing.Point(440, 318) Me.Button1.Name = "Button1" Me.Button1.Size = New System.Drawing.Size(111, 29) Me.Button1.TabIndex = 20 Me.Button1.Text = "SIMPAN FILE" Me.Button1.UseVisualStyleBackColor = True ' 'Kata ' Me.Kata.Multiline = True Me.Kata.Name = "Kata" Me.Kata.ScrollBars = System.Windows.Forms.ScrollBars.Vertical Me.Kata.Size = New System.Drawing.Size(242, 77) Me.Kata.TabIndex = 14 ' 'ToolStripMenuItem1 ' Me.ToolStripMenuItem1.Name = "ToolStripMenuItem1" Me.ToolStripMenuItem1.Size = New System.Drawing.Size(57, 6) ' 'FileToolStripMenuItem ' Me.FileToolStripMenuItem.DropDownItems.AddRange(New

  System.Windows.Forms.ToolStripItem() {Me.ToolStripMenuItem1}) Me.FileToolStripMenuItem.Name = "FileToolStripMenuItem" Me.FileToolStripMenuItem.Size = New System.Drawing.Size(37,20) Me.FileToolStripMenuItem.Text = "exit" ' 'Pic1 ' Me.Pic1.Location = New System.Drawing.Point(310, 58) Me.Pic1.Name = "Pic1" Me.Pic1.Size = New System.Drawing.Size(242, 248) Me.Pic1.SizeMode =

  System.Windows.Forms.PictureBoxSizeMode.StretchImage Me.Pic1.TabIndex = 13 Me.Pic1.TabStop = False ' 'MenuStrip1 ' Me.MenuStrip1.Items.AddRange(New System.Windows.Forms.ToolStripItem()

  {Me.FileToolStripMenuItem}) Me.MenuStrip1.Location = New System.Drawing.Point(0, 0) Me.MenuStrip1.Name = "MenuStrip1" Me.MenuStrip1.Size = New System.Drawing.Size(808, 24) Me.MenuStrip1.TabIndex = 12 Me.MenuStrip1.Text = "MenuStrip1" '

  ' Me.OFD.FileName = "OpenFileDialog1" ' 'GroupBox1 ' Me.GroupBox1.Controls.Add(Me.tk) Me.GroupBox1.Controls.Add(Me.K3) Me.GroupBox1.Controls.Add(Me.K1) Me.GroupBox1.Controls.Add(Me.xkata) Me.GroupBox1.Controls.Add(Me.K2) Me.GroupBox1.Controls.Add(Me.xjumlah) Me.GroupBox1.Location = New System.Drawing.Point(37, 738) Me.GroupBox1.Name = "GroupBox1" Me.GroupBox1.Size = New System.Drawing.Size(738, 199) Me.GroupBox1.TabIndex = 24 Me.GroupBox1.TabStop = False Me.GroupBox1.Text = "GroupBox1" ' 'tk ' Me.tk.Location = New System.Drawing.Point(580, 28) Me.tk.Multiline = True Me.tk.Name = "tk" Me.tk.ScrollBars = System.Windows.Forms.ScrollBars.Vertical Me.tk.Size = New System.Drawing.Size(152, 139) Me.tk.TabIndex = 26 ' 'K3 ' Me.K3.Location = New System.Drawing.Point(214, 66) Me.K3.Multiline = True Me.K3.Name = "K3" Me.K3.ScrollBars = System.Windows.Forms.ScrollBars.Vertical Me.K3.Size = New System.Drawing.Size(164, 101) Me.K3.TabIndex = 24 ' 'K1 ' Me.K1.Location = New System.Drawing.Point(413, 19)

  Me.K1.Name = "K1" Me.K1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical Me.K1.Size = New System.Drawing.Size(146, 138) Me.K1.TabIndex = 20 ' 'xkata ' Me.xkata.AutoSize = True Me.xkata.Location = New System.Drawing.Point(105, 25) Me.xkata.Name = "xkata" Me.xkata.Size = New System.Drawing.Size(39, 13) Me.xkata.TabIndex = 21 Me.xkata.Text = "Label1" ' 'K2 ' Me.K2.Location = New System.Drawing.Point(12, 62) Me.K2.Multiline = True Me.K2.Name = "K2" Me.K2.ScrollBars = System.Windows.Forms.ScrollBars.Vertical Me.K2.Size = New System.Drawing.Size(177, 105) Me.K2.TabIndex = 23 ' 'xjumlah ' Me.xjumlah.AutoSize = True Me.xjumlah.Location = New System.Drawing.Point(273, 25) Me.xjumlah.Name = "xjumlah" Me.xjumlah.Size = New System.Drawing.Size(39, 13) Me.xjumlah.TabIndex = 22 Me.xjumlah.Text = "Label1" ' 'Button3 ' Me.Button3.Location = New System.Drawing.Point(145, 424) Me.Button3.Name = "Button3" Me.Button3.Size = New System.Drawing.Size(75, 27) Me.Button3.TabIndex = 26 Me.Button3.Text = "Sisipkan"

  ' 'Button4 ' Me.Button4.Location = New System.Drawing.Point(304, 515) Me.Button4.Name = "Button4" Me.Button4.Size = New System.Drawing.Size(242, 28) Me.Button4.TabIndex = 27 Me.Button4.Text = "Kirim Kata keChipertext" Me.Button4.UseVisualStyleBackColor = True ' 'Button5 ' Me.Button5.Location = New System.Drawing.Point(304, 318) Me.Button5.Name = "Button5" Me.Button5.Size = New System.Drawing.Size(111, 28) Me.Button5.TabIndex = 28 Me.Button5.Text = "BUKA GAMBAR" Me.Button5.UseVisualStyleBackColor = True ' 'Label2 ' Me.Label2.BackColor =

  System.Drawing.SystemColors.ButtonShadow Me.Label2.Location = New System.Drawing.Point(303, 53) Me.Label2.Name = "Label2" Me.Label2.Size = New System.Drawing.Size(503, 259) Me.Label2.TabIndex = 29 ' 'Button6 ' Me.Button6.Location = New System.Drawing.Point(695, 319) Me.Button6.Name = "Button6" Me.Button6.Size = New System.Drawing.Size(111, 28) Me.Button6.TabIndex = 30 Me.Button6.Text = "Kembali" Me.Button6.UseVisualStyleBackColor = True ' 'Button7 ' Me.Button7.Name = "Button7" Me.Button7.Size = New System.Drawing.Size(75, 23) Me.Button7.TabIndex = 31 Me.Button7.Text = "Button7" Me.Button7.UseVisualStyleBackColor = True ' 'Button8 ' Me.Button8.Location = New System.Drawing.Point(196, 480) Me.Button8.Name = "Button8" Me.Button8.Size = New System.Drawing.Size(75, 23) Me.Button8.TabIndex = 32 Me.Button8.Text = "Button8" Me.Button8.UseVisualStyleBackColor = True ' 'Button9 ' Me.Button9.Location = New System.Drawing.Point(40, 169) Me.Button9.Name = "Button9" Me.Button9.Size = New System.Drawing.Size(110, 23) Me.Button9.TabIndex = 33 Me.Button9.Text = "Buka File Text" Me.Button9.UseVisualStyleBackColor = True ' 'Form1 ' Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.BackColor = System.Drawing.Color.WhiteSmoke Me.ClientSize = New System.Drawing.Size(808, 386) Me.Controls.Add(Me.Button9) Me.Controls.Add(Me.Button8) Me.Controls.Add(Me.Button7) Me.Controls.Add(Me.Button6) Me.Controls.Add(Me.Button5) Me.Controls.Add(Me.Button4) Me.Controls.Add(Me.Button3) Me.Controls.Add(Me.GroupBox1) Me.Controls.Add(Me.btnAmbil) Me.Controls.Add(Me.Pic2)

  Me.Controls.Add(Me.Kata) Me.Controls.Add(Me.Pic1) Me.Controls.Add(Me.MenuStrip1) Me.Controls.Add(Me.txtchiper) Me.Controls.Add(Me.Label1) Me.Controls.Add(Me.encryptButton) Me.Controls.Add(Me.DataTextBox) Me.Controls.Add(Me.DataLabel) Me.Controls.Add(Me.keyTextBox) Me.Controls.Add(Me.keyLabel) Me.Controls.Add(Me.Label2) Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D Me.MaximizeBox = False Me.Name = "Form1" Me.StartPosition =

  System.Windows.Forms.FormStartPosition.CenterScreen Me.Text = "Enkripsi" CType(Me.Pic2, System.ComponentModel.ISupportInitialize).EndInit() CType(Me.Pic1, System.ComponentModel.ISupportInitialize).EndInit() Me.MenuStrip1.ResumeLayout(False) Me.MenuStrip1.PerformLayout() Me.GroupBox1.ResumeLayout(False) Me.GroupBox1.PerformLayout() Me.ResumeLayout(False) Me.PerformLayout() End Sub #End Region Private Sub encryptButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles encryptButton.Click 'Me.decryptButton.Enabled = False Dim X AsXTeaCrypto.XTea = New XTeaCrypto.XTea Me.txtchiper.Text = X.encrypt(Me.DataTextBox.Text, Me.keyTextBox.Text) 'Me.encryptButton.Enabled = False 'Me.decryptButton.Enabled = True For a = 1 To Len(txtchiper.Text) b = Microsoft.VisualBasic.Mid(txtchiper.Text, a, 1) tk.Text = tk.Text&DesToBin(Asc(b)) 'Kata.Text = Kata.Text& b Next Kata.Text = txtchiper.Text End Sub Private Sub decryptButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) 'Me.encryptButton.Enabled = False Dim X AsXTeaCrypto.XTea = New XTeaCrypto.XTea Me.DataTextBox.Text = X.decrypt(Me.txtchiper.Text, Me.keyTextBox.Text) 'Me.encryptButton.Enabled = True ' Me.decryptButton.Enabled = False End Sub Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Pic1.Image = Nothing Pic2.Image = Nothing Kata.Text = "" txtchiper.Text = "" DataTextBox.Text = "" End Sub Private Sub OpenFileToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) OFD.Filter = "JPG |*.jpg|BMP| *.bmp|TIF |*.tif" OFD.ShowDialog() If OFD.FileName = "" Then Exit Sub Pic1.Image = Image.FromFile(OFD.FileName) gambar = New Bitmap(Pic1.Image) Me.Text = gambar.Height&" x " &gambar.Width End Sub Function KataToBiner(ByVal txt As String) As String Dim nDes As Long

  Dim nBin As String Dim chex As String Dim i As Double Dim ckata As String KataBiner = "" For i = 1 To Len(txt) ckata = Mid(txt, i, 1) nDes = Asc(ckata) chex = Hex(nDes) nBin = HEXA_2_BIN(chex) KataBiner = KataBiner&nBin Next KataToBiner = KataBiner End Function Function HEXA_2_BIN(ByRef SHEX_DIGIT As String) As String Dim xBin As String Dim xbin2 As String Dim xkata As String Dim i As Integer For i = 1 To Len(SHEX_DIGIT) xBin = "" xkata = Mid(SHEX_DIGIT, i, 1) Select Case UCase(xkata) Case "0" xBin = "0000" Case "1" xBin = "0001" Case "2" xBin = "0010" Case "3" xBin = "0011" Case "4" xBin = "0100" Case "5" xBin = "0101" Case "6" xBin = "0110" Case "7" xBin = "0111" xBin = "1000" Case "9" xBin = "1001" Case "A" xBin = "1010" Case "B" xBin = "1011" Case "C" xBin = "1100" Case "D" xBin = "1101" Case "E" xBin = "1110" Case "F" xBin = "1111" Case "h", "H" xBin = "" Case Else xBin = "" End Select xbin2 = xbin2 + xBin Next HEXA_2_BIN = xbin2 End Function Function DesimalToBiner(ByRefJumlah As Long) As String Dim nBin As String Dim chex As String chex = Hex(Jumlah) nBin = HEXA_2_BIN(chex) If Jumlah<= 15 Then nBin = "0000" &nBin DesimalToBiner = nBin End Function Function toLSB(ByValxBin As String, ByValxhuruf As String) As String If xhuruf = "" Then toLSB = xBin Else toLSB = Mid(xBin, 1, 7) &xhuruf End If

  Public Function toDecimal(ByValInptB As Object) As Object Dim b, D, C, A, e, f, baseB As Object baseB = 2 b = InptB e = 0 f = 0 Do A = Microsoft.VisualBasic.Right(b, 1) b = Microsoft.VisualBasic.Left(b, Len(b) - 1) C = baseB ^ f D = A * C e = e + D f = f + 1 Loop Until b = "" toDecimal = e End Function Function GetJumlahData() As Double Dim xpix As Long Dim jBit As String jBit = "" Pic1.Image = gambar Pc = 0 For Pb = 0 Togambar.Width - 1 vM = gambar.GetPixel(Pb, Pc).R vH = gambar.GetPixel(Pb, Pc).G vB = gambar.GetPixel(Pb, Pc).B jBit = jBit&Microsoft.VisualBasic.Mid((DesimalToBiner(vM)), 8, 1) & _ Microsoft.VisualBasic.Mid((DesimalToBiner(vH)), 8, 1) & _ Microsoft.VisualBasic.Mid((DesimalToBiner(vB)), 8, 1) xpix = xpix + 1 If xpix> 3 Then Exit For Next GetJumlahData = toDecimal(Mid(jBit, 1, 8)) 'MsgBox(GetJumlahData) End Function Function GetPesan(ByValpesan As String, ByValjBit As Long) As String

  Dim xbyte As String Dim i, j As Integer GetPesan = "" kata = "" For i = 9 TojBit Step 8 xbyte = Mid(pesan, i, 8) j = j + 8 kata = kata &Chr(toDecimal(xbyte)) Next i GetPesan = kata End Function Function GETPESANAN(ByValpesan As String, ByValjBit As Long) As String Dim kata As String Dim xbyte As String Dim i, j As Integer GETPESANAN = "" kata = "" For i = 9 TojBit Step 8 xbyte = Mid(pesan, i, 8) j = j + 8 kata = kata &Chr(toDecimal(xbyte)) Next i GETPESANAN = kata End Function Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim X AsXTeaCrypto.XTea = New XTeaCrypto.XTea Dim sijones As String = "" 'sijones = X.decrypt(Me.Kata.Text, "12345678") sijones = X.decrypt(Me.Kata.Text, keyTextBox.Text) 'xkata.Text = Len(Kata.Text) 'K1.Text = KataToBiner(Kata.Text) 'xjumlah.Text = Len(K1.Text) If Len(Trim(Kata.Text)) = 0 Then MsgBox("Kata yang maudisisipkanpadagambartidakada!", vbCritical, "Error") Exit Sub

  Dim xpx As Long Dim xpix As Long Dim i As Long Dim xhuruf1 As String Dim xhuruf2 As String Dim xhuruf3 As String xkata.Text = Len(sijones) K1.Text = DesimalToBiner(Len(sijones)) &KataToBiner(sijones) 'K1.Text = DesimalToBiner(Len(Kata.Text)) 'K1.Text = DesimalToBiner(Len(Kata.Text)) &tk.Text xjumlah.Text = Len(K1.Text) xpx = Int(Len(K1.Text) / 3) Me.Refresh() 'K2.Text = "" 'K3.Text = "" Pic2.Image = gambar i = 1 For Pc = 0 Togambar.Height - 1 For Pb = 0 Togambar.Width - 1 vM = gambar.GetPixel(Pb, Pc).R vH = gambar.GetPixel(Pb, Pc).G vB = gambar.GetPixel(Pb, Pc).B 'K2.Text = K2.Text & " " &DesimalToBiner(vM) & " " &DesimalToBiner(vH) & " " &DesimalToBiner(vB) &vbCrLf xhuruf1 = Mid(K1.Text, i, 1) xhuruf2 = Mid(K1.Text, i + 1, 1) xhuruf3 = Mid(K1.Text, i + 2, 1) ' K3.Text = K3.Text & " " &toLSB(DesimalToBiner(vM), xhuruf1) & " " &toLSB(DesimalToBiner(vH), xhuruf2) & " " &toLSB(DesimalToBiner(vB), xhuruf3) &vbCrLf vM = toDecimal(toLSB(DesimalToBiner(vM), xhuruf1)) vH = toDecimal(toLSB(DesimalToBiner(vH), xhuruf2)) vB = toDecimal(toLSB(DesimalToBiner(vB), xhuruf3)) gambar.SetPixel(Pb, Pc, Color.FromArgb(vM, vH, vB)) xpix = xpix + 1 If xpix>xpx Then Exit For i = i + 3 Next Pic2.Invalidate()

  Next 'bagianmenyimpan SFD.Filter = "BMP|*.bmp" SFD.ShowDialog() If SFD.FileName = "" Then Exit Sub 'If SFD.FilterIndex = 1 Then ' gambar.Save(SFD.FileName + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg) ' End If If SFD.FilterIndex = 1 Then gambar.Save(SFD.FileName, System.Drawing.Imaging.ImageFormat.Bmp) End If End Sub Private Sub btnAmbil_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAmbil.Click Dim X AsXTeaCrypto.XTea = New XTeaCrypto.XTea Dim sihelen As String = "" Dim xpx As Long Dim xpix As Long xkata.Text = GetJumlahData() xpx = Int(((Val(xkata.Text) + 1) * 8) / 3) 'bagianmengambl pixel Pic1.Image = gambar K2.Text = "" For Pc = 0 Togambar.Height - 1 For Pb = 0 Togambar.Height - 1 vM = gambar.GetPixel(Pb, Pc).R vH = gambar.GetPixel(Pb, Pc).G vB = gambar.GetPixel(Pb, Pc).B K2.Text = K2.Text &Microsoft.VisualBasic.Mid((DesimalToBiner(vM)), 8, 1) & _ Microsoft.VisualBasic.Mid((DesimalToBiner(vH)), 8, 1) & _ Microsoft.VisualBasic.Mid((DesimalToBiner(vB)), 8, 1) xpix = xpix + 1 If xpix>xpx Then Exit For K2.Refresh() Next

  'sihelen = X.encrypt(GetPesan(K2.Text, (xkata.Text + 1) * 8), "12345678") sihelen = X.encrypt(GetPesan(K2.Text, (xkata.Text + 1) * 8), keyTextBox.Text) Kata.Text = sihelen 'txtchiper.Text = GETPESANAN(K2.Text, (xkata.Text + 1) * 8) txtchiper.Text = sihelen End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Pic1.Image = Nothing Pic2.Image = Nothing Kata.Text = "" txtchiper.Text = "" DataTextBox.Text = "" End Sub Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Kata.Text = txtchiper.Text End Sub Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click txtchiper.Text = Kata.Text End Sub Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click OFD.Filter = "JPG |*.jpg|BMP| *.bmp|TIF |*.tif" OFD.ShowDialog() If OFD.FileName = " " Then Exit Sub Pic1.Image = Image.FromFile(OFD.FileName) gambar = New Bitmap(Pic1.Image) Me.Text = gambar.Height&" x " &gambar.Width End Sub

  Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click Me.Close() End Sub Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click Dim a As Integer, b As String tk.Text = "" For a = 1 To Len(txtchiper.Text) b = Microsoft.VisualBasic.Mid(txtchiper.Text, a, 1) tk.Text = tk.Text&DesToBin(Asc(b)) 'Kata.Text = Kata.Text& b Next End Sub Public Function DesToBin(ByValNDesimal As Long) As String Dim C As Byte Dim D As Long Dim NilaiAs String Dim pjg As Integer Dim bitawal As String Dim a As Integer On Error GoToErrorHandler D = (2 ^ 31) - 1 While D > 0 If NDesimal - D >= 0 Then NDesimal = NDesimal - D Nilai = Nilai& "1" Else If Val(Nilai) > 0 Then Nilai = Nilai& "0" End If D = D / 2 End While bitawal = "" If Len(Trim(Nilai)) < 8 Then pjg = 8 - Len(Nilai) For a = 1 Topjg bitawal = bitawal& "0" Next

  DesToBin = bitawal&Nilai Exit Function ErrorHandler: DesToBin = 0 End Function Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button8.Click MsgBox(Len(K1.Text) & "-" & Len(tk.Text)) End Sub Function revisikata(ByVal key As String) As String Dim a As Integer, k As String, hasil As String For a = 1 To Len(key) k = Microsoft.VisualBasic.Mid(key, a, 1) If k = "?" Then Else hasil = hasil& k End If Next revisikata = hasil End Function Sub LoadFileNotepad() Dim i As Integer = FreeFile() Dim s As String, s1 As String s = "" : s1 = "" ' OFD.Filter = "txt |*.txt| *.txt |*.txt" OFD.ShowDialog() If OFD.FileName = " " Then Exit Sub 'Pic1.Image = Image.FromFile(OFD.FileName) ' Me.Text = OFD.FileName FileOpen(i, OFD.FileName, OpenMode.Input) Do Until EOF(i) Input(i, s) 'tiapbaris d tampung d variabel "s" s1 &= s &IIf(EOF(i), "", vbCrLf) Loop FileClose(i)

  'Me.Text = s1 End Sub Private Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click LoadFileNotepad() End Sub Private Sub FileToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles FileToolStripMenuItem.Click Application.Exit() End Sub End Class

  

CURRICULUM VITAE

DATA PRIBADI Nama : Helen Sri Maharani Tempatlahir : Parsiburan Tanggallahir : 26Maret 1992 Jeniskelamin : Perempuan Golongandarah : B KONTAK Alamat : jl.JaminGinting, Gg.Kamboja no.9 Padang Bulan, Medan No. HP : 082361590035 Email PENDIDIKAN TK : - SD : SD Negeri NO:044855Parsaoran (1998 – 2004) SMP : SMP Negeri 1 LaweSigala-gala (2004 – 2007) SMA : SMA SwastaPantiHarapanLaweDesky (2007 – 2010) Universitas : S1 IlmuKomputer (2010 – 2014)