Passkeys are an internationally recognised security standard. The FIDO Alliance has developed this modern, open and multi-vendor authentication method.
A passkey consists of a pair of public and private keys. The public key is registered with the website or application you are using, while the private key is stored exclusively on your device. This creates a strong, confidential relationship between your device and the website or application you are using.
Passkeys act as passwords, with the advantage that they remain stored on your device and never need to be exchanged with the web service. Your device authenticates itself by proving that it has the private key, but without revealing it.
So not only are passkeys a more convenient way to log in than passwords, they are also much more secure. In particular, passkeys protect you from threats such as phishing.