Authentication is used by most web applications. Both for letting users have access to individual accounts, but also for protecting certain resources from the public. Basic authentication allows an individual to prove to the application that they are the user that is trying to access it. Unfortunately, authentication vulnerabilities are often found by pen testers too.
While there are many forms of authentication, the most common implementations are that of the username and password. Many modern applications have also adopted further authentication methods to help strengthen their security posture, such as multi-factor authentication (MFA).
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