If a website is a subdomain of uantwerpen.be, the university can provide digital certificates for free for that website (e.g https://visielab-pc.uantwerpen.be ). This is a good thing, because we can work with https instead of http. Keep in mind that these certificates expire after 2 years, and thus should be renewed within 2 years after being installed. You can check the expiry date by getting more info of the corresponding certificate (left mouse when over the secure connection icon→show connection details→expiry date).