If you surf to a website and have to log in, you must always enter an e-mail address and password. To make this easier, the manufacturers of browsers have developed a "smartkey". With the Firefox browser, passwords are kept in a so-called "master password". When you log into the website, the browser will keep track of your e-mail address and password and link them together.

In order for strangers not to have access to your personal information, that information is encrypted. If people with bad intentions want to steal your password, they would not be able to do much with it. Your password is encrypted. Instead of text, symbols are shown.

"At least if they don't have "hacker skills". One of my colleagues discovered the leak earlier by accident. He is studying cybercrime and his job was to find traces on a computer. When he tried to find out the passwords, he noticed, to his great surprise, that these passwords could simply be read in text," says Cedric De Vroey.