(via identityblog.switch.ch):
«Passkeys are a new secure login standard developed by the FIDO Alliance and the World Wide Web Consortium. With a Passkey, you can securely log in to edu-ID without having to enter a password. To unlock your Passkeys you can use the same biometric data or device password that you use to unlock your device. Passkeys are unique to you and are tied to a website, making them resistant to phishing and hacking attempts.
The best thing about Passkeys: If you have an up-to-date device (up-to-date computer, operating system, browser) you can use Passkeys right away. You don’t need to install any special apps, extensions or plugins.
To set up a Passkey for the edu-ID login, go to https://eduid.ch and click on “Passkey Login”. The wizard will then guide you through the setup.»