User controlled passwords are a major vulnerability because users reuse passwords and are able to share them with others. The security of passwordless authentication systems depends on the proof of identity required and their implementation. For example, using secure push notifications to the account holder’s mobile device is generally considered more secure than passwords. One TIme Password over SMS on mobile devices are generally used as a second factor of authentication apart from traditional username and password combination.
Phishing, reuse, and sharing are common issues when relying on passwords, with passwordless login users have better control over their account and are less susceptible to phishing. With passwords out of the picture, both user experience and security improve.
Password spraying is an attack that attempts to access a large number of accounts (usernames) with a few commonly used passwords. Traditional brute-force attacks attempt to gain unauthorized access to a single account by guessing the password. In password spraying, an attacker tries combinations of username and passwords from the list of commonly used passwords.
Credentials stuffing is a type of attack in which stolen credentials are used which consists of a list of usernames along with their passwords. Credentials stuffing is different from the brute force attack in the sense that it does not try to guess the credentials of a user rather uses a list of credentials leaked. Credential stuffing attacks are possible because many users reuse the same username/password combination across multiple sites, with one survey reporting that 81% of users have reused a password across two or more sites and 25% of users use the same passwords across a majority of their accounts.
Brute force attack is a type of attack in which a combination of username and password is guessed by trial and error. It consists of repeated login attempts made with different combinations each time. Guessing a short password can be relatively simple, but that isn’t necessarily the case for longer passwords or encryption keys, the difficulty of brute force attacks grows exponentially the longer the password or key is.
The login can be done by username and 2-factor or only username which can be decided based on the user role. If a role is not allowed for passwordless login they will log in with a password and username.
You can log in with WordPress username + password, and then 2nd-factor authentication.
In this second option you get variations of Username + Password and Username + 2-Factor Authentication in the same window.
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