Authentication

What is authentication?

Authentication is the process of verifying the identity of a user, system, or device before granting access to a resource. It answers one question. Are you who you say you are? Get it right and the rest of a secure system has solid ground to stand on. Get it wrong and everything above it is exposed.

Methods range from passwords and one-time codes to biometrics and token-based systems like OAuth or JWT. Combine more than one and you have multi-factor authentication, where a stolen password alone is not enough to get in. A banking app that texts you a code after you type your password is running MFA. Authentication is also distinct from authorisation, which decides what an authenticated user is allowed to do once they are in. Both matter, and they solve different problems.

Weak authentication is behind a large share of security breaches. Reused passwords, missing rate limits, tokens that never expire. For any product that handles accounts or sensitive data, getting authentication right is a foundational requirement, not a feature you bolt on later.

Authentication at Dallonses

We build authentication into products that handle real user data, with the boring parts done properly. Token expiry, password hashing, rate limiting, OAuth flows with Google and Microsoft, multi-factor where the risk calls for it. None of it is glamorous, and all of it matters the day someone tries to break in.

Clients often come to us with an auth layer that grew by accident and now nobody trusts it. We map what exists, find the gaps, and rebuild the parts that put accounts at risk. The goal is a system where identity is verified cleanly and the people relying on it can stop worrying about it.

Need login and identity you can actually trust? Let's get it right.

Talk to us about authentication