List of oAuth Providers

OAuth, short for “Open Authorization,” is an industry-standard protocol used for authorization, allowing third-party services to securely access a user’s data without exposing their credentials. It facilitates delegated access, granting applications limited access to user accounts on various websites and APIs.

Intro to oAuth

At its core, OAuth operates on the principle of authorization delegation, enabling users to grant access to their resources stored on one site to another site, without sharing their credentials. This process involves several key entities:

• Resource Owner: The entity that owns the data and authorizes access to it, typically the user.
• Client: The application requesting access to the protected resources on behalf of the resource owner.
• Authorization Server: The server that authenticates the resource owner and issues access tokens.
• Resource Server: The server hosting the protected resources that the client wants to access.

OAuth employs a series of authorization grants to obtain access tokens, which the client then presents to the resource server to gain access to the protected resources. These grants include authorization code, implicit, password, and client credentials.

List of oAuth Providers

OAuth Name	Company	OAuth Protocol	Technologies/Languages	Links	OpenID Connect
42 School	42 School	2.0	OAuth, REST API	Unknown	No
Amazon Cognito	Amazon	2.0	OAuth, REST API	Unknown	No
Apple	Apple	2.0	OAuth, OpenID Connect	Unknown	Yes
Atlassian	Atlassian	Unknown	OAuth, REST API	Unknown	No
Auth0	Auth0	2.0	OAuth, OpenID Connect	How to start with Auth0	Yes
Authentik	Authentik	Unknown	OAuth, OpenID Connect	Unknown	No
Azure Active Directory	Microsoft	Unknown	OAuth, OpenID Connect	Unknown	No
Azure Active Directory B2C	Microsoft	Unknown	OAuth, OpenID Connect	Unknown	No
Battle.net	Blizzard Entertainment	2.0	OAuth, REST API	Unknown	No
Box	Box	2.0	OAuth, REST API	Unknown	No
BoxyHQ SAML	BoxyHQ	Unknown	SAML, OAuth	Unknown	No
Bungie	Bungie	2.0	OAuth, REST API	Unknown	No
Coinbase	Coinbase	2.0	OAuth, REST API	Unknown	No
Discord	Discord	2.0	OAuth, REST API	Unknown	No
Dropbox	Dropbox	2.0	OAuth, REST API	Unknown	No
DuendeIdentityServer6	Duende	Unknown	OAuth, OpenID Connect	Unknown	No
EVE Online	CCP Games	2.0	OAuth, REST API	Unknown	No
Facebook	Meta (formerly Facebook)	2.0	OAuth, OpenID Connect	Unknown	Yes
FACEIT	FACEIT	2.0	OAuth, REST API	Unknown	No
Foursquare	Foursquare	2.0	OAuth, REST API	Unknown	No
Freshbooks	Freshbooks	2.0	OAuth, REST API	Unknown	No
FusionAuth	FusionAuth	Unknown	OAuth, OpenID Connect	Unknown	No
GitHub	GitHub	2.0	OAuth, REST API	Unknown	No
GitLab	GitLab	2.0	OAuth, REST API	Unknown	Yes
Google	Google	2.0	OAuth, OpenID Connect	How to tutorial	Yes
HubSpot	HubSpot	2.0	OAuth, REST API	Unknown	No
IdentityServer4	IdentityServer	2.0	OAuth, OpenID Connect	Unknown	No
Instagram	Meta (formerly Facebook)	2.0	OAuth, REST API	Unknown	No
Kakao	Kakao	2.0	OAuth, REST API	Unknown	No
Keycloak	Red Hat	2.0	OAuth, OpenID Connect	Unknown	Yes
LINE	LINE Corporation	2.0	OAuth, REST API	Unknown	No
LinkedIn	Microsoft (owned by Meta)	2.0	OAuth, OpenID Connect	Unknown	Yes
Mail.ru	Mail.ru Group	2.0	OAuth, REST API	Unknown	No
Mailchimp	Mailchimp	2.0	OAuth, REST API	Unknown	No
Medium	A Medium Corporation	2.0	OAuth, REST API	Unknown	No
Naver	Naver Corporation	2.0	OAuth, REST API	Unknown	No
Netlify	Netlify	2.0	OAuth, REST API	Unknown	No
Okta	Okta	2.0	OAuth, OpenID Connect	Unknown	Yes
OneLogin	OneLogin	2.0	OAuth, OpenID Connect	How to start with MFA one login	No
Osso	Osso	Unknown	SAML, OAuth	Unknown	No
osu!	ppy Pty Ltd	2.0	OAuth, REST API	Unknown	No
Patreon	Patreon	2.0	OAuth, REST API	Unknown	No
Pinterest	Pinterest	2.0	OAuth, REST API	Unknown	No

Role of OAuth Providers

OAuth providers play a pivotal role in the authentication and authorization process, serving as the intermediaries between clients and resource servers. They handle user authentication, token issuance, and token validation, ensuring secure and seamless access to protected resources.

Key Functions of OAuth Providers

1. Authentication: OAuth providers authenticate users, verifying their identities before granting access to protected resources. This authentication process typically involves username-password credentials or more advanced methods like multi-factor authentication.
2. Token Management: OAuth providers issue access tokens to clients after successful authentication. These tokens serve as credentials that the client presents to the resource server to access the user’s data.
3. Authorization: OAuth providers enforce authorization policies, determining the scope of access granted to clients based on user consent and application permissions. They ensure that clients only access the resources explicitly authorized by the resource owner.

Evolution of OAuth

As technology evolves, so does OAuth. Over the years, OAuth has undergone several iterations and enhancements to address emerging security challenges and accommodate evolving use cases. Let’s explore the evolution of OAuth and its impact on modern authentication practices.

OAuth 1.0a
OAuth 1.0a, the first iteration of the OAuth protocol, introduced the concept of token-based authentication, allowing applications to access protected resources on behalf of users. It relied on cryptographic signatures to ensure the integrity and authenticity of requests, providing a secure mechanism for delegated access.

OAuth 2.0
OAuth 2.0, the successor to OAuth 1.0a, introduced significant improvements and simplifications to the protocol. It standardized the token-based authentication process, emphasizing flexibility, scalability, and interoperability. OAuth 2.0 introduced several key concepts, including authorization codes, access tokens, and refresh tokens, streamlining the authentication and authorization workflow.

OpenID Connect
OpenID Connect (OIDC) builds upon OAuth 2.0 to provide authentication capabilities in addition to authorization. It introduces identity tokens and user information endpoints, enabling clients to verify the identity of users and obtain additional information about them. OIDC enhances the security and usability of OAuth by adding identity layer functionality.

OAuth in Practice
In practice, OAuth is widely adopted across various industries and applications, powering authentication and authorization for a myriad of use cases. From social media platforms and e-commerce websites to enterprise applications and IoT devices, OAuth plays a crucial role in securing access to resources and protecting user data.

Future of OAuth
As technology continues to advance, the future of OAuth holds promise for further innovation and evolution. Emerging trends such as decentralized identity, zero-trust security, and federated authentication are shaping the landscape of authentication and authorization. OAuth is poised to adapt to these changes, providing a robust foundation for secure and seamless access control.

In conclusion, OAuth providers play a critical role in modern authentication and authorization workflows, ensuring secure access to resources while maintaining user privacy and control. Understanding the functions and significance of OAuth providers is essential for developers, security professionals, and organizations seeking to implement robust access control mechanisms.