What Is OpenID Connect?

OpenID Connect has become a cornerstone in the world of digital identity. It presents a simple way to identify users based on their authentication performed by an authorization server. But what is it exactly, and how does it work? Let’s find out in this post.

What is OpenID Connect?

OpenID Connect, often abbreviated as OIDC, is a standard protocol for modern user authentication. It provides a layer on top of the OAuth 2.0 protocol, which is primarily used for authorization. With OpenID Connect, an app can delegate the task of user authentication to a dedicated service and receive a reliable identity assertion in return.

How does OpenID Connect work?

OpenID Connect operates by facilitating an exchange of ‘tokens’. When a user logs into a website or application using OpenID Connect, the website sends a request to the OpenID provider. This request contains the necessary information to verify the user’s identity. The OpenID provider then responds with an ID token, which contains user profile information, and optionally an Access Token, which allows the website or application to access the user’s data.

How does OpenID Connect work with OAuth 2.0?

OpenID Connect extends the OAuth 2.0 protocol to provide a simple identity layer. While OAuth 2.0 is designed to provide applications with access tokens that grant them specific scopes, or permissions, OpenID Connect uses the same flow to authenticate users. It includes an ID token along with the access token returned from the OAuth 2.0 authorization request. This ID token contains claims about the authentication of an end user, allowing the client application to know who the user is that has authenticated.

Benefits of OpenID Connect

OpenID Connect brings numerous benefits to businesses and developers alike:

  • Simplified user authentication

By delegating user authentication to a dedicated service, OpenID Connect simplifies the process for developers. They no longer have to worry about securely storing passwords or implementing multifactor authentication since the OpenID provider handles this.

  • Improved user experience

For users, OpenID Connect means they can use a single set of credentials across multiple websites and applications. This not only simplifies their experience but also reduces the risk of password fatigue.

  • Enhanced security

OpenID Connect enhances security by providing a standardized, secure method for applications to verify users’ identities. This includes protection against common threats such as phishing attacks and identity theft.

  • Greater interoperability

As a widely accepted standard, OpenID Connect promotes interoperability. It allows different software applications to communicate and share user identities, increasing IT efficiency and collaboration.


OpenID Connect presents an efficient, secure, and user-friendly solution for user authentication. By leveraging the power of OAuth 2.0, it provides developers with a simplified approach to user authentication while enhancing the user experience and security.

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