Requiring passwords to sign up for a service has many demerits, such as a high chance of passwords being stolen and requiring users to remember passwords all the time. On the contrary, a passwordless authentication system has many benefits. For instance, it saves users from being a victim of the most common attack—the Brute Force Attack. Additionally, many users have a tendency to use the same password for multiple websites/applications, which then can lead to a Credential Stuffing Attack. A passwordless authentication system helps save users from such an attack as well.
A passwordless authentication system lets users access the applications by verifying their identity using a secure token, biometric signature or any other secure proof of identity which is not knowledge based or does not require any private information.