What is Authentication?

Defination

Authentication is the process of verifying the identity of a user, device, or entity before granting access to a system or resource.

Explanation

Authentication is the process of confirming that someone is who they claim to be. In the digital world, this usually means proving your identity before you are allowed to access a device, app, or online service. It acts like a security check that only lets the right people in.

For example, when you enter a password to unlock your phone or log in to a website, you are going through authentication. Some systems also use things like fingerprints, face recognition, or codes sent to your phone. All of these methods help prove that you are the real user and not someone pretending to be you.

Authentication is important because it protects your personal information, such as messages, photos, and bank accounts, from being accessed by others. Without proper authentication, anyone could pretend to be you and misuse your data.

In short, authentication is like showing your ID before entering a secure area. It helps keep your digital life safe by making sure only authorized people can get in.