Which of the following is the most secure means of authentication?

Certificate is the most secure means of authentication among the given options2. A certificate is a digital document that contains information about the identity of a user or a device, and is signed by a trusted authority. A certificate can be used to prove the identity of a user or a device without revealing any sensitive information, such as passwords or tokens. Password, token, and pre-shared secret are less secure means of authentication because they can be easily compromised, stolen, or guessed by attackers. References: Secure User Authentication Methods - freeCodeCamp.org, What is the Most Secure Authentication Method for Your Organization …