kriptografi

Private Sub Form1_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 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

End Class