Passkeys represent an advanced authentication technology aimed at replacing traditional passwords with secure and user-friendly login methods, utilizing public key cryptography to provide device-specific credentials that resist phishing and replay attacks. Their widespread adoption is facilitated by support from all modern browsers, offering advantages like biometric authentication and passwordless logins. However, integrating passkeys into existing systems without replacing current authentication providers can be challenging. Descope offers a solution by enabling the addition of passkeys without altering the primary authentication provider, enhancing security and aligning with modern identity management trends. A detailed guide explains how to integrate passkeys into an existing Okta application using Descope as an OpenID Connect Identity Provider, allowing for seamless incorporation of passkey authentication alongside conventional methods. This integration not only improves security but also offers various features like cross-device passkeys, A/B testing for auth flows, and backup authentication methods, making passkeys a valuable addition for organizations seeking to enhance their user authentication processes.