Membuat Program Kriptografi dengan Vb.Net 2008
Gambar 1 : Bentuk Enskripsi.
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Gambar 2. Bentuk Deskripsi
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Berikut Skrip Program :
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Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
plainteks.Text = ""
chipertex.Text = ""
End Sub
Private Sub btnDeskripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDeskripsi.Click
Dim jumlah As Double = Len(plainteks.Text)
Dim x As String
Dim xkalimat As String = ""
Dim i As Double
Dim bil As Integer
For i = 1 To jumlah
x = Mid(plainteks.Text, i, 1)
bil = Asc(x) + 3
x = Chr(bil)
xkalimat = xkalimat + x
Next i
chipertex.Text = xkalimat
End Sub
Private Sub ens_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ens.Click
Dim jumlah As Double = Len(chipertex.Text)
Dim x As String
Dim xkalimat As String = ""
Dim i As Double
Dim bil As Integer
For i = 1 To jumlah
x = Mid(chipertex.Text, i, 1)
bil = Asc(x) - 3
x = Chr(bil)
xkalimat = xkalimat + x
Next i
chipertex.Text = xkalimat
End Sub
End Class
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GRONSFIELD CHIPER
Skrip Program :
Public Class
Menu_Utama
Private Sub CaesarChiperToolStripMenuItem_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CaesarChiperToolStripMenuItem.Click
Caeser_Chiper.MdiParent = Me
Caeser_Chiper.Show()
End Sub
Private Sub GronsfeldChiperToolStripMenuItem_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
GronsfeldChiperToolStripMenuItem.Click
Grondfeld_Chiper.MdiParent = Me
Grondfeld_Chiper.Show()
End Sub
Private Sub VernamChiperToolStripMenuItem_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
VernamChiperToolStripMenuItem.Click
Vernam_Chiper.MdiParent = Me
Vernam_Chiper.Show()
End Sub
Private Sub VigenereChiperToolStripMenuItem_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
VigenereChiperToolStripMenuItem.Click
Vegenere_Chiper.MdiParent = Me
Vegenere_Chiper.Show()
End Sub
Private Sub DesChiperToolStripMenuItem_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
DesChiperToolStripMenuItem.Click
Des_Chiper.MdiParent = Me
Des_Chiper.Show()
End Sub
Private Sub RC4ToolStripMenuItem_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles RC4ToolStripMenuItem.Click
RC4.MdiParent = Me
RC4.Show()
End Sub
Private Sub KeluarToolStripMenuItem_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles KeluarToolStripMenuItem.Click
End
End Sub
Private Sub MenuStrip1_ItemClicked(ByVal sender As System.Object, ByVal
e As System.Windows.Forms.ToolStripItemClickedEventArgs) Handles
MenuStrip1.ItemClicked
End Sub
Private Sub KeluarToolStripMenuItem1_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
KeluarToolStripMenuItem1.Click
End
End Sub
End Class
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VERNAM
CHIPER
Skrip Program.
Public Class
Vernam_Chiper
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Dim j As Integer
Dim jum As Integer
Dim sKey As String
Dim nKata As Integer
Dim nKunci As Integer
Dim sKata As String
Dim sPlain As String = ""
Dim nEnc As Integer
j = 0
sKata = Plainteks.Text
jum = Len(sKata)
sKey = Kunci.Text
For i = 1 To jum
If j = Len(sKey) Then
j = 1
Else
j = j + 1
End If
nKata = Asc(Mid(sKata, i, 1)) - 65
nKunci = Asc(Mid(sKey, j, 1)) - 65
nEnc = ((nKata + nKunci) Mod 26)
sPlain = sPlain & Chr((nEnc) + 65)
Next i
Chiperteks.Text = sPlain
End Sub
Private Sub Vernam_Chiper_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
Plainteks.Text = ""
Kunci.Text = ""
Chiperteks.Text = ""
End Sub
Private Sub Plainteks_KeyPress(ByVal sender As Object, ByVal e As
System.Windows.Forms.KeyPressEventArgs) Handles Plainteks.KeyPress
e.KeyChar = UCase(e.KeyChar)
Dim tombol As Integer = Asc(e.KeyChar)
If Not (((tombol >= 65) And (tombol <= 90)) Or
(tombol = 8)) Then
e.Handled = True
End If
End Sub
End Class
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Caesar Chiper
Skrip Program.
Private Sub CaesarChiperToolStripMenuItem_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
CaesarChiperToolStripMenuItem.Click
Caeser_Chiper.MdiParent = Me
Caeser_Chiper.Show()
End Sub
Private Sub GronsfeldChiperToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles GronsfeldChiperToolStripMenuItem.Click
Grondfeld_Chiper.MdiParent = Me
Grondfeld_Chiper.Show()
End Sub
Private Sub VernamChiperToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles VernamChiperToolStripMenuItem.Click
Vernam_Chiper.MdiParent = Me
Vernam_Chiper.Show()
End Sub
Private Sub VigenereChiperToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles VigenereChiperToolStripMenuItem.Click
Vegenere_Chiper.MdiParent = Me
Vegenere_Chiper.Show()
End Sub
Private Sub DesChiperToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DesChiperToolStripMenuItem.Click
Des_Chiper.MdiParent = Me
Des_Chiper.Show()
End Sub
Private Sub RC4ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RC4ToolStripMenuItem.Click
RC4.MdiParent = Me
RC4.Show()
End Sub
Private Sub KeluarToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KeluarToolStripMenuItem.Click
End
End Sub
Private Sub MenuStrip1_ItemClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolStripItemClickedEventArgs) Handles MenuStrip1.ItemClicked
End Sub
Private Sub KeluarToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KeluarToolStripMenuItem1.Click
End
End Sub
End Class
Caeser_Chiper.MdiParent = Me
Caeser_Chiper.Show()
End Sub
Private Sub GronsfeldChiperToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles GronsfeldChiperToolStripMenuItem.Click
Grondfeld_Chiper.MdiParent = Me
Grondfeld_Chiper.Show()
End Sub
Private Sub VernamChiperToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles VernamChiperToolStripMenuItem.Click
Vernam_Chiper.MdiParent = Me
Vernam_Chiper.Show()
End Sub
Private Sub VigenereChiperToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles VigenereChiperToolStripMenuItem.Click
Vegenere_Chiper.MdiParent = Me
Vegenere_Chiper.Show()
End Sub
Private Sub DesChiperToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DesChiperToolStripMenuItem.Click
Des_Chiper.MdiParent = Me
Des_Chiper.Show()
End Sub
Private Sub RC4ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RC4ToolStripMenuItem.Click
RC4.MdiParent = Me
RC4.Show()
End Sub
Private Sub KeluarToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KeluarToolStripMenuItem.Click
End
End Sub
Private Sub MenuStrip1_ItemClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolStripItemClickedEventArgs) Handles MenuStrip1.ItemClicked
End Sub
Private Sub KeluarToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KeluarToolStripMenuItem1.Click
End
End Sub
End Class
Public Class Caeser_Chiper
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim jumlah As Double = Len(Plainteks.Text)
Dim x As String
Dim xkalimat As String = ""
Dim i As Double
Dim bil As Integer
For i = 1 To jumlah
x = Mid(Plainteks.Text, i, 1)
bil = Asc(x) + 3
x = Chr(bil)
xkalimat = xkalimat + x
Next i
Chiperteks.Text = xkalimat
End Sub
Private Sub Deskripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Deskripsi.Click
Dim jumlah As Double = Len(Chiperteks.Text)
Dim x As String
Dim xkalimat As String = ""
Dim i As Double
Dim bil As Integer
For i = 1 To jumlah
x = Mid(Chiperteks.Text, i, 1)
bil = Asc(x) - 3
x = Chr(bil)
xkalimat = xkalimat + x
Next i
Plainteks.Text = xkalimat
End Sub
End Class
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Desc Chiper.
Public Class
Des_Chiper
Private Sub Enkripsi_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Enkripsi.Click
'Dim key As String, kunciChar As String, katabaru As
String
Dim Pos As Long
Dim i As Long, Side1 As String, Side2 As String
Dim nEnc As Long
Dim j As Integer
Pos = 1
For i = 1 To Len(Plaintext.Text)
Plaintext.Text = Mid(Plaintext.Text, i, 1)
kunci.Text = Mid(kunci.Text, Pos, 1)
Chipertext.Text = Chipertext.Text &
Chr(Asc(Plaintext.Text)) Or Asc(Kunci.Text)
If Pos = Len(kunci) Then Pos = 0
Pos = Pos + 1
Next i
j = Len(Chipertext.Text) Mod 2 = 0
If j Then
Side1 = Strings.Left(Chipertext.Text,
(Len(Chipertext.Text) / 2))
Side2 = Strings.Right(Chipertext.Text,
(Len(Chipertext.Text) / 2))
Chipertext.Text = Side1 & Side2
End If
nEnc = Chipertext.Text
End Sub
Private Sub Des_Chiper_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
Plaintext.Text = ""
Chipertext.Text = ""
End Sub
End Class
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Vigner Chiper
Skrip Program.
Public Class
Vegenere_Chiper
Private Sub Vegenere_Chiper_Load(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles MyBase.Load
Plaintext.Text = ""
Chipertext.Text = ""
Kunci.Text = ""
End Sub
Private Sub Enkripsi_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Enkripsi.Click
Dim J As Integer
Dim Jum As Integer
Dim sKey As String
Dim nKata As Integer
Dim nKunci As Integer
Dim sKata As String
Dim sPlain As String = ""
Dim nEnc As Integer
J = 0
sKata = Plaintext.Text
Jum = Len(sKata)
sKey = Kunci.Text
For i = 1 To Jum
If J = Len(sKey) Then
J = 1
Else
J = J + 1
End If
nKata = Asc(Mid(sKata, i, 1)) + 0
nKunci = Asc(Mid(sKey, J, 1)) + 0
nEnc = ((nKata + nKunci) Mod 256)
sPlain = sPlain & Chr((nEnc))
Next i
Chipertext.Text = sPlain
End Sub
End Class
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