Program Kriptografi Vigenere Dengan Visual Basic dot NET 2008

  Berikut ini merupakan pembelajaran atas Program Kriptografi Vigenere Dengan Visual Basic dot NET 2008.


Lumayan terkenal juga, karna sudah menggunakan kunci, namun masih tergolong klasik. Silahkah anda pelajari programnya. :)

Design Form Program Kriptografi Vigenere Dengan Visual Basic dot NET 2008 berikut :



Ketik listing program berikut :
Public Class Form1

    Private Sub btnProses_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProses.Click
        Chipertext.Text = Enkripsi(Plaintext.Text, Kunci.Text)
    End Sub

    Function Enkripsi(ByVal Teks As String, ByVal Kunci As String) As String
        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(Teks)
        sPlain = ""
        sKey = Kunci
        sKata = Teks
        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
        Enkripsi = sPlain
    End Function
End Class