Windows Live ID
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Create Identity-aware Applications

Windows Live ID is the identity and authentication system provided by Windows Live. Currently, more than 380 million users have credentials that work with Windows Live ID. Three software development kits (SDKs) now make it possible for developers like you to use this powerful service.

 

 

Web Authentication

Windows Live ID Web Authentication enables you to authenticate users on your Web site and offer personalized access to your site’s content to any of the millions of registered Windows Live ID users.

Download the Web SDK Now

Delegated Authentication

Windows Live ID Delegated Authentication helps you get permission to access users' information on Windows Live services. Then you can deliver great new functionality to users while they remain in firm control of their data.

Download the Delegated Authentication SDK now

Client Authentication

Windows Live ID Client Authentication makes it possible for you to develop identity-aware client applications.

Download the Client SDK Now

Windows Live ID Blog

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Delivering Data Portability – Delegated Authentication SDK v1.0

Today the Windows Live™ ID team released the Delegated Authentication SDK v1.0, which provides a platform-neutral way for Web applications to access customers’ information from Windows Live services while customers remain in firm control of their own data. This release is part of a broader announcement of a whole set of releases from the Windows Live Platform team that are described by our boss Da....

Windows Live ID adopts Extended Validation (EV) SSL Certificates.

Windows Live ID is very committed to the safety of its users. To further protect the users against phishing, Windows Live ID has adopted Extended Validation (EV) SSL Certificates. EV SSL certificates require a company to undergo an extensive vetting process and provide users additional assurance about the identity and authenticity of web sites they visit.  Thus when a user visits Live ID in IE7,....

Windows Live ID adds Beta support for Information Cards with Windows CardSpace!

Windows CardSpace is a new way to sign in securely and conveniently into websites. And now you can use CardSpace with your Windows Live ID account! Using CardSpace with Windows Live ID means you don’t use a password to sign-in. Instead, just send your Information Card to Live ID to identify you and get signed into Hotmail, Windows Live Spaces or any other site that accepts Windows Live ID. And i....

Windows Live ID Web Authentication SDK for Developers Is Released

Windows Live ID Web Authentication allows sites who want to integrate with the Windows Live services and platform. We are releasing a set of tools that make this integration easier than ever.   Web Authentication works by sending your users to the Windows Live ID sign-in page by means of a specially formatted link. The service then directs them back to your Web site along with a unique, site....

Windows Live ID Client 1.0 SDK Alpha REFRESH -- Now available!

You can now download the new version of the Windows Live™ ID Client 1.0 SDK, the Client Alpha Refresh. This release includes some software updates, and keeps us on our way to the final 1.0 release by the end of this year. As always, we take your feedback very seriously, so please let us know what you want to see in future releases by posting to our forum. With the Alpha refresh release, we intro....