1. Kriptografi Chiper
2. Kriptografi Vernam
3. Kriptografi Gronsfield
4. Kriptografi Vigenere
yang pertama buat menu utamanya seperti dibawah ini
Public Class Form2
Private Sub KiptografiCaesarToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KriptografiCaesarToolStripMenuItem.Click
Form1.MdiParent = Me
Form1.Show()
End Sub
Private Sub KriptografiVernamToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KriptografiVernamToolStripMenuItem.Click
Form3.MdiParent = Me
Form3.Show()
End Sub
Private Sub KrptografGronsfieldToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KrptografGronsfieldToolStripMenuItem.Click
Form4.MdiParent = Me
Form4.Show()
End Sub
Private Sub KriptografiVingenereToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KriptografiVingenereToolStripMenuItem.Click
Form5.MdiParent = Me
Form5.Show()
End Sub
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
End Class
kemudian desainlah form seperti dibawah ini
untuk kriptografi Chiper
Public Class Form1
Private Sub Btnenkripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnenkripsi.Click
Dim x As String = ""
Dim xkalimat As String = ""
For i = 1 To Len(plain.Text)
x = Mid(plain.Text, i, i)
x = Chr(Asc(x) + 3)
xkalimat = xkalimat + x
Next
chiper.Text = xkalimat
End Sub
Private Sub btndeskripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btndeskripsi.Click
Dim x As String = ""
Dim xkalimat As String = ""
For i = 1 To Len(plain.Text)
x = Mid(plain.Text, i, i)
x = Chr(Asc(x) - 3)
xkalimat = xkalimat + x
Next
chiper.Text = xkalimat
End Sub
End Class
Maka hasilnya akan terlihat seperti di bawah ini
Untuk Kriptografi Vernam
Listing program
Public Class Form3
Private Sub OneTimePad_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
plainteks.Text = ""
kunci.Text = ""
chiperteks.Text = ""
End Sub
Private Sub btnenkripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnenkripsi.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 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
Private Sub kunci_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles kunci.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
Maka hasilnya akan terlihat,
kemudian Kriptografi Gronsfield
desain form nya seperti di bawah ini...
Listing program
Public Class Form4
Private Sub Form4_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
plainteks.Text = ""
chiperteks.Text = ""
End Sub
Private Sub btnenkripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnenkripsi.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
jum = Len(Text)
splain = ""
skey = kunci.Text
skata = 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))
nEnc = (nkata + nkunci) Mod 26
splain = splain & Chr((nEnc) + 65)
Next i
chiperteks.Text = splain
End Sub
End Class
Maka hasilnya akan seperti dibawah ini,
yang terakhir Kriptografi Vigenere
desain form.....
Listing Program...
Public Class Form5
Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
plainteks.Text = ""
chiperteks.Text = ""
kunci.Text = ""
End Sub
Private Sub btnenkripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnenkkripsi.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)) + 0
nKunci = Asc(Mid(sKey, J, 1)) + 0
nEnc = ((nKata + nKunci) Mod 256)
sPlain = sPlain & Chr((nEnc))
Next i
chiperteks.Text = sPlain
End Sub
End Class
Hasilnya terlihat seperti dibawah ini..
