OpenID Connect (OIDC) is an authentication protocol that enhances security and user experience by simplifying the authentication process and managing permissions, enabling secure software deployments with tools like Harness. Built on top of OAuth 2.0, OIDC acts as a digital identity card, providing a standardized way to verify user identities without the need for multiple passwords, thus supporting regulatory compliance and streamlining user management and access control. It utilizes short-term tokens to reduce security risks and ensures only legitimate users can access applications, with OAuth 2.0 determining user actions and permissions. Key components of OIDC include Relying Parties, Identity Providers, ID Tokens, UserInfo Endpoints, and Scopes and Claims, which collectively facilitate a seamless user experience and robust security measures. OIDC is particularly useful in modern applications requiring identity verification, offering advantages such as secure and seamless login, no password storage, and interoperability across platforms and identity providers. When integrated with platforms like Harness, OIDC strengthens security in software deployments, allowing organizations to focus on innovation while providing a secure and user-friendly experience.