Authentication server definition

An authentication server is what determines whether a person or another server is who or what they say they are. Authentication is usually done through credentials — a client submits logins, and they’re either granted or denied access to a service.

Real authentication server examples

One of the most common examples of authentication is logging in to a website with credentials like an email address and a password.

Authentication server cyber attacks

Brute force: the attacker tries thousands of random combinations until they guess the password.

Credential stuffing: the attacker tries credentials from previously leaked databases to see if they match other services.

Stopping an authentication attack

• Make sure you have unique, complicated, and long passwords.
• Always make sure that your connection is secure.
• Don’t click on unknown links.
• Use a VPN.

Further reading