OpenID

OpenID is an open standard for digital identity that allows users to log into different apps and services using one set of credentials managed by an identity provider they trust. Instead of creating unique usernames and passwords for every app, users can authenticate with their OpenID identity (often from providers like Google, Yahoo, or specialized identity services) and gain access to multiple applications. This single sign-on capability reduces password fatigue and improves security by centralizing authentication.

The OpenID protocol works by redirecting users to their chosen identity provider for authentication, then returning them to your app with verified identity information. Your app doesn’t store passwords or manage authentication directly—instead, it trusts the identity provider to verify users. This decentralized approach means users maintain control over their identity and can choose which provider to trust, unlike proprietary systems that lock users into specific platforms.

For businesses building mobile apps, implementing OpenID reduces development and maintenance costs associated with managing user credentials, password resets, and account security. Users appreciate the convenience of signing in with familiar accounts rather than creating new ones, which can significantly improve registration conversion rates. OpenID also reduces security liability since your app doesn’t store sensitive authentication credentials. The modern evolution of OpenID (OpenID Connect) has become the standard for mobile app authentication, combining proven identity verification with OAuth’s authorization capabilities.