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Authentication server

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.