---
url: 'https://www.corbado.com/glossary/delegated-authentication'
title: 'Delegated Authentication'
description: 'Learn what delegated authentication is, its benefits for improving user experience and security, and how it integrates seamlessly with passkeys and WebAuthn.'
lang: 'en'
keywords: 'delegated-authentication'
---

# Delegated Authentication

## What is Delegated Authentication?

**Delegated authentication** is a process in which a service or application relies on a
trusted third-party identity provider to verify user identities, rather than handling user
authentication itself.

In other words, when [delegated authentication](https://www.corbado.com/blog/delegated-sca-psd3-passkeys) is
used, users log in through a familiar external service (like Google, Apple, or Microsoft)
instead of creating a separate username and password for every application. The primary
benefits of delegated authentication include:

- **Simplified User Experience**: Users manage fewer credentials, making login faster and
  easier.
- **Improved Security**: Authentication is handled by specialized providers, typically
  employing advanced security measures like multi-factor authentication (MFA) and
  passkeys.
- **Reduced Development Effort**: Developers avoid building complex authentication systems
  by integrating established third-party solutions.

[Delegated authentication](https://www.corbado.com/blog/delegated-sca-psd3-passkeys) is widely used in
[Single Sign-On](https://www.corbado.com/blog/passkeys-single-sign-on-sso) (SSO) solutions, OAuth-based
integrations, and modern authentication frameworks incorporating passkeys and WebAuthn,
providing secure, streamlined authentication across multiple platforms and services.

> **Key Takeaways:**
> 
> - **Delegated authentication** is when applications rely on trusted third-party identity
>   providers for [user verification](https://www.corbado.com/blog/webauthn-user-verification).
> - It simplifies login experiences, enhances security, and reduces development complexity.
> - [Delegated authentication](https://www.corbado.com/blog/delegated-sca-psd3-passkeys) integrates well with
>   advanced authentication methods like passkeys, MFA, and WebAuthn standards.

---

## How Delegated Authentication Works

Delegated authentication relies on a relationship between an application (also called the
"[relying party](https://www.corbado.com/glossary/relying-party)") and a trusted external identity provider
(IdP), such as Google, Microsoft Azure AD, Apple, or other specialized providers.

The typical delegated authentication flow involves these key steps:

1. **Login Request**: The user attempts to log in to the application and selects an
   external provider (e.g., "Log in with Google").

2. **Redirection to Provider**: The user is redirected to the identity provider’s secure
   login page.

3. **Authentication by Provider**: The identity provider authenticates the user through
   their established methods, which can include:
    - Passwords (traditional but less secure)
    - Multi-factor authentication (SMS, [authenticator](https://www.corbado.com/glossary/authenticator) apps)
    - Biometric verification (fingerprint, facial recognition)
    - Passkeys (modern, cryptographic credentials replacing passwords)

4. **Successful Verification and Token Issuance**: Upon successful authentication, the
   provider sends a secure token (often JWT – JSON Web Token) back to the application,
   confirming the user’s identity and permissions.

5. **User Access**: The application verifies the token and grants the user access without
   having handled sensitive login credentials directly.

## Benefits of Delegated Authentication

Delegated authentication offers substantial advantages to software developers, product
managers, and end users alike:

- **Enhanced User Experience (UX)**: Users experience fewer login barriers and manage
  fewer passwords, leading to increased user satisfaction and retention.

- **Stronger Security**: Identity providers typically invest significantly in security
  infrastructure, offering advanced protection like MFA,
  [risk-based authentication](https://www.corbado.com/blog/identity-fraud-layered-authentication-identiverse-2026),
  and modern solutions like passkeys, substantially reducing
  [vulnerabilities](https://www.corbado.com/glossary/vulnerability) compared to traditional password-based
  systems.

- **Lower Development and Maintenance Costs**: Delegating authentication allows developers
  to avoid costly, complex implementations of user authentication systems, accelerating
  product development cycles and reducing technical debt.

## Delegated Authentication and Passkeys

Delegated authentication is increasingly leveraging **passkeys**, a new, secure, and
user-friendly form of authentication based on public-key cryptography. Passkeys offer
several distinct advantages within delegated authentication scenarios:

- **Phishing Resistance**: Passkeys eliminate [vulnerabilities](https://www.corbado.com/glossary/vulnerability)
  associated with traditional passwords by relying on cryptographic authentication, which
  is inherently [phishing](https://www.corbado.com/glossary/phishing)-resistant.

- **Seamless Multi-Device Authentication**: Passkeys synchronize securely across user
  devices through cloud-based solutions, providing seamless, passwordless login
  experiences across various platforms.

- **Compliance and Security Standards**: Passkeys align well with modern authentication
  standards like WebAuthn and [FIDO2](https://www.corbado.com/glossary/fido2), ensuring compatibility,
  compliance, and robust security in delegated authentication setups.

As authentication practices evolve, delegated authentication coupled with passkeys
represents a modern, secure, and user-centric approach that benefits users, developers,
and businesses significantly.

## Delegated Authentication FAQs

### What is delegated authentication used for?

Delegated authentication lets applications rely on trusted third-party identity providers
(like Google or Apple) to securely authenticate users, simplifying user management and
enhancing security.

### What are common examples of delegated authentication?

Common examples include "Login with Google," "Sign in with Apple," and
[Single Sign-On](https://www.corbado.com/blog/passkeys-single-sign-on-sso) (SSO) systems that let users log into
multiple services using one identity provider.

### Is delegated authentication secure?

Yes, delegated authentication enhances security by utilizing identity providers who
specialize in secure authentication techniques, including passkeys, MFA, biometrics, and
strong cryptographic standards.

### How does delegated authentication improve UX?

Delegated authentication reduces friction by allowing users to manage fewer login
credentials, making login processes faster, easier, and more secure.

### What role do passkeys play in delegated authentication?

Passkeys provide secure, cryptographic authentication within delegated authentication
flows, eliminating password risks, improving user experience, and significantly reducing
[phishing](https://www.corbado.com/glossary/phishing) and credential-based attacks.