Encrypt and decrypt on all computers on VB.NET

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VB

Visual-Studio

Guys, I have a program that runs straight from a USB stick, I would like to encrypt and decrypt your app.config on any computer, but I'm new in this area and I don't know how to do that. Can anyone help me a functional example?

I am using this code to encrypt and decrypt, but it does not work on all computers.

What I have tried:

System.Configuration

Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        'Encrypt
        Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)
        Dim configSection As ConfigurationSection
        configSection = config.AppSettings

        If Not (configSection Is Nothing) Then
            If Not (configSection.ElementInformation.IsLocked) Then   configSection.SectionInformation.ProtectSection("rsaProtectedConfigurationProvider")
                configSection.SectionInformation.ForceSave = True
                config.Save(ConfigurationSaveMode.Full)
            End If
        End If
        MsgBox("Success!")
    End Sub

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        'Decrypt
        Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)
        Dim configSection As ConfigurationSection
        configSection = config.AppSettings

        If Not (configSection Is Nothing) Then
            If Not (configSection.ElementInformation.IsLocked) Then
                configSection.SectionInformation.UnprotectSection()
                configSection.SectionInformation.ForceSave = True
                config.Save(ConfigurationSaveMode.Full)
            End If
        End If
        MsgBox("Success!")
    End Sub
End Class