tugas pemograman kriptografi

TUGAS PEMOGRAMAN KRIPTOGRAFI

1. Buka Microsoft Visual Studio 2008

2. Klik => Create: Project

3. Ubah Project name dengan Nama anda atau dengan nama kriptografi

4. Maka setelah itu akan muncul sebuah Form1 pada Project kita

 

5.coba desain form seperti contoh gambar di bawah ini :

 

Untuk membuat menu file gunakan menustrip yang ada pada toolbox ,lalu ketikan nama kriptografi lalu ketikan tanda “ _” lalu enter gunanya untuk membuat garis bawah pada nama kriptografi yang di buat tadi

Lalu klik add windows form pada menu project

Lalu desain form dengan ketentuan :

untuk “label”, anda hanya cukup mengganti “Text” nya saja,untuk “texsbox” hanya cukup mengganti “Name” nya saja,untuk “button”nya baru di ganti “name” dan “text”nya,bila sudah selesai di desain,maka langkah selanjutnya
menganti propertis text box pada kotak propertis

1.      multiline menjadi “ true”dan

2.      scroball menjadi “vertical”

 Tampilan form menu kriptografi

List program Menu:

Public Class Form1

    

    Private Sub KiptografivernamToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KiptografiVernamToollStripMenuItem.Click

        kriptografi_caesar.Show()pi

        Me.Hide()

    End Sub

    Private Sub KiptografiVernamToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KiptografiVernamToolStripMenuItem1.Click

        kriptografi_Vernam.Show()

        Me.Hide()

    End Sub

    Private Sub KiptografivigenereToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KiptografIVigenereToolStripMenuItem.Click

        Kriptografi_Gronsfeld.Show()

        Me.Hide()

    End Sub

    Private Sub KiptografIVigenereToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles KiptografIVigenereToolStripMenuItem1.Click

        Kriptografi_Vigenere.Show()

        Me.Hide()

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

End Class

Tampilan form Kriptografi Caesar:

 

Listing Program Kriptografi Caesar:

Public Class kriptografi_caesar

    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 Btndekripsi_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btndekripsi.Click

        Dim x As String = ""

        Dim xkalimat As String = ""

        For i = 1 To Len(chiper.Text)

            x = Mid(chiper.Text, i, i)

            x = Chr(Asc(x) - 3)

            xkalimat = xkalimat + x

        Next

        plain.Text = xkalimat

    End Sub

    Private Sub chiper_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles chiper.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 chiper_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chiper.TextChanged

    End Sub

    Private Sub kriptografi_caesar_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

End Class

Hasil Program Kriptografi Caesar:

Enkripsi

 

 dekripsi

 

Tampilan form Kriptografi Vernam:

Listing Program Kriptografi Vernam :

Public Class kriptografi_Vernam

    Private Sub Label3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label3.Click

    End Sub

    Private Sub kriptografi_Vernam_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 plainteks_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles plainteks.TextChanged

    End Sub

End Class

Hasil Program Kriptografi vernam:

 

Tampilan form Kriptografi Gronsfeld:

 

Listing Program Kriptografi Gronsfeld

Public Class Kriptografi_Gronsfeld

    Private Sub Kriptografi_Gronsfeld_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 = (Mid(sKey, j, 1))

            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

Hasil Program Kriptografi Gronsfeld

 

Tampilan form Kriptografi  Vigenore

 

Listing Program Kriptografi  Vigenore

Public Class Kriptografi_Vigenere

    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 sPlainteks 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))

            nKunci = Asc(Mid(sKey, j, 1))

            nEnc = ((nKata + nKunci) Mod 256)

            sPlainteks = sPlainteks & Chr((nEnc))

        Next i

        chiperteks.Text = sPlainteks

Hasil program Kriptografi  Vigenore