Authentication

Definition

Authentication is the process of verifying the identity of a user or process. It answers the question, "Are you who you say you are?".

Why It Matters

Authentication is the foundation of security. It is the gatekeeper that ensures only legitimate users can access a system or data.

Contextual Example

When you enter your username and password on a website, you are performing authentication. The website checks if the credentials you provided match what it has on file to verify your identity.

Common Misunderstandings

• Authentication is not the same as Authorization. Authentication is about identity, while Authorization is about permissions (what you are allowed to do after you are authenticated).
• Common factors of authentication include something you know (password), something you have (phone), and something you are (fingerprint).

Related Terms