EasyMAUICapturePrevent

Easy Screen Capture & Recording Protection in .NET MAUI

ScreenShot

Supported Platform

Android (tested on Android 13)
iOS (require 13+) (tested on iOS 16.4)
Windows (require Windows 10 20h1+) (tested on Windows 11)\

How to use

Just copy this single file at your project. https://github.com/bho3538/EasyMAUICapturePrevent/blob/master/MAUICapturePreventLib/PreventCapture.cs\

After copy and include it, just call like this at secure page code in your app.

public partial class SecureWebPage : ContentPage
{
    private MAUICapturePreventLib.PreventCapture _capture = new MAUICapturePreventLib.PreventCapture();
    public SecureWebPage()
    {
        InitializeComponent();
        this.Loaded += SecureWebPage_Loaded;
        this.Unloaded += SecureWebPage_Unloaded;
    }

    private void SecureWebPage_Unloaded(object sender, EventArgs e)
    {
        // unprotect page from screen capture
        _capture.SetPageAllowCapture(this);
    }

    private void SecureWebPage_Loaded(object sender, EventArgs e)
    {
        // protect page from screen capture
        _capture.SetPagePreventCapture(this);
    }
}

'MAUICapturePrevent' is sample project include secure webview page.

How does it work

In Windows platform, Call 'SetWindowDisplayAffinity' WinAPI to prevent capture.
In Android platform, Set 'FLAG_SECURE' at current app window.
In iOS platform, Create dummy 'Secure TextField' at current view.
(Credits : orakull's answer from stackoverflow 'https://stackoverflow.com/a/67054892')

License