Latihan Kriptografi
Berikut ini adalah design dan cara-cara penyelesaiannya
1. Tampilan Dari Menu Utama
Desaignnya :
Dan Berikut ini adalah cara memanggil form-form yang akan ditampilkan dari menu Utama
Public Class Form1
Private Sub PEMOGRAMANKRIPTOGRAFIToolStripMenuItem_Click(ByVal
sender As System.Object, ByVal e As System.EventArgs) Handles
PEMOGRAMANKRIPTOGRAFIToolStripMenuItem.Click
Form2.MdiParent = Me
Form2.Show()
End Sub
Private Sub PEMOGRAMANKRIPTOGRAFIToolStripMenuItem1_Click(ByVal
sender As System.Object, ByVal e As System.EventArgs) Handles
PEMOGRAMANKRIPTOGRAFIToolStripMenuItem1.Click
Form3.MdiParent = Me
Form3.Show()
End Sub
Private Sub KRIPTOGRAFIToolStripMenuItem_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
KRIPTOGRAFIToolStripMenuItem.Click
Form4.MdiParent = Me
Form4.Show()
End Sub
Private Sub KRIPTOGRAFIVEGENERIToolStripMenuItem_Click(ByVal sender
As System.Object, ByVal e As System.EventArgs) Handles
KRIPTOGRAFIVEGENERIToolStripMenuItem.Click
Form5.MdiParent = Me
Form5.Show()
End Sub
End Class
Hasilnya :
2. Tampilan Dari Pemograman Kriptografi Caesar Chiper
Designnya :
Listing Programnya:
Public Class Form2
Private Sub enkripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles enkripsi.Click
Dim x As String = ""
Dim xkalimat As String = ""
For i = 1 To Len(plaintext.Text)
x = Mid(plaintext.Text, i, i)
x = Chr(Asc(x) + 3)
xkalimat = xkalimat + x
Next
chipertext.Text = xkalimat
End Sub
Private Sub deskripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles deskripsi.Click
Dim x As String = ""
Dim xkalimat As String = ""
For i = 1 To Len(plaintext.Text)
x = Mid(plaintext.Text, i, i)
x = Chr(Asc(x) + 3)
xkalimat = xkalimat + x
Next
plaintext.Text = xkalimat
End Sub
Private Sub keluar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles keluar.Click
Dim lia As Integer
lia = MsgBox("anda mau keluar ?", MsgBoxStyle.YesNo)
If lia = MsgBoxResult.Yes Then
Me.Close()
End If
End Sub
Private Sub hapus_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles hapus.Click
plaintext.Text = ""
chipertext.Text = ""
End Sub
Private Sub kkkriptogrfi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles kkkriptogrfi.Click
Me.Hide()
kkkriptogrfi.Show()
End Sub
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
End Class
Berikut hasilnya:
3. Cara penyelesaian Pemograman Kriptografi Vernam Chiper
Designya :
Listing programnya:
Public Class Form3
Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Plaintext.Text = ""
kunci.Text = ""
chipertext.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)) - 65
nkunci = Asc(Mid(skey, j, 1)) - 65
nEnc = ((nkata + nkunci) Mod 26)
splain = splain & Chr((nEnc))
Next i
chipertext.Text = splain
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
Private Sub Plaintext_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Plaintext.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
Hasilnya:
4. Cara Penyelesaian Pemograman Kriptografi Gronsfeld
Designya :
Listing programnya:
Public Class Form4
Private Sub Form4_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
plaintext.Text = ""
chipertext.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
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
chipertext.Text = splain
End Sub
End Class
Hasilnya:
5 . Cara penyelesaian Kriptografi Vigenere
Designya :
Listing programnya:
Public Class Form5
Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
plaintext.Text = ""
kunci.Text = ""
chipertext.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
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))
nkunci = Asc(Mid(skey, j, 1))
nEnc = ((nkata + nkunci) Mod 256)
splain = splain & Chr((nEnc))
Next i
chipertext.Text = splain
End Sub
End Class
Berikut hasilnya:
