Federated Credential Management (FedCM) Migration for Google Identity Services

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class="summary-container glue-page glue-spacer-4-top"> <div class="date-time"> <div class="published-date glue-font-weight-medium">FEB 13, 2024</div> </div> </section> <section class="glue-page glue-grid glue-spacer-1-top"> <section class="author-container glue-grid__col glue-grid__col--span-4-sm glue-grid__col--span-10-md"> <div class="author-obj"> <a class="glue-font-weight-medium" href="/en/search/?author=Gina+Biernacki">Gina Biernacki</a> <span class="glue-font-weight-medium role">Product Manager</span> </div> </section> <section class="social-container glue-grid__col glue-grid__col--span-4-sm glue-grid__col--span-2-md"> <button id="social-button" class="glue-button glue-button--low-emphasis glue-button--icon" aria-haspopup="true" aria-expanded="false"> <svg role="presentation" aria-hidden="true" class="glue-icon"> <use href="/glue-icon/#share"></use> </svg> <span>Share</span> </button> <ul id="social-menu" class="glue-elevation-level-1" role="menu" aria-labelledby="social-button"> 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data-block-key="f79as"><b><sub>UPDATE</sub></b><sub>: On July 22, 2024, the</sub> <a href="https://privacysandbox.com/intl/en_us/"><sub>Privacy Sandbox</sub></a><sub> initiative</sub> <a href="https://privacysandbox.com/news/privacy-sandbox-update/"><sub>announced</sub></a><sub> a new path focused on elevating user choice, instead of third-party cookie deprecation. The change in Privacy Sandbox direction does not impact Google Identity Service’s investment in FedCM. We see FedCM as valuable for</sub><a href="https://groups.google.com/a/chromium.org/g/blink-dev/c/URpYPPH-YQ4/m/63CQwRrEBwAJ?e=48417069"><sub> improving the privacy, security and user experience</sub></a><sub> of federated sign-in experiences independently from any changes to third-party cookies. The ongoing migration to the FedCM API will continue as scheduled. If you are using GIS</sub> <a href="https://developers.google.com/identity/gsi/web/guides/features"><sub>One Tap</sub></a><sub> or</sub> <a href="https://developers.google.com/identity/gsi/web/guides/automatic-sign-in-sign-out"><sub>Automatic Sign-in</sub></a><sub> on your website, please be aware of the migration timeline below.</sub></blockquote><p data-block-key="4icv6"><i>If you need more time to verify FedCM functionality on your site and make changes to your code, you can</i> <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration#fedcm_flag"><i>temporarily exempt</i></a><i> your traffic from using FedCM until February 2025.</i></p><hr/><p data-block-key="1c5v9"><br/>Chrome is phasing out support for third-party cookies next year, subject to addressing any remaining concerns of the <a href="https://www.gov.uk/cma-cases/investigation-into-googles-privacy-sandbox-browser-changes">CMA</a>. A relatively new web API, Federated Credential Management (FedCM), will enable sign-in for the Google Identity Services (GIS) library after the phase out of third-party cookies. Starting in April, GIS developers will be automatically migrated to the FedCM API. For most developers, this migration will occur seamlessly through backwards-compatible updates to the GIS library. However, some websites with custom integrations may require minor changes. We encourage all developers to experiment with FedCM, as previously announced through the <a href="https://developers.googleblog.com/2023/08/announcing-federated-credential-management-beta-for-gis.html">beta program</a>, to ensure flows will not be interrupted. Developers have the ability to <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration#fedcm_flag">temporarily exempt</a> traffic from using FedCM until Chrome enforces the restriction of third-party cookies.</p><h3 data-block-key="bihn6"><b><br/>Audience</b></h3><p data-block-key="ejt9v">This update is for all GIS web developers who rely on the Chrome browser and use:</p><ul><li data-block-key="clu0p">One Tap, or</li><li data-block-key="4nv6c">Automatic Sign-In</li></ul><h3 data-block-key="1unrt"><b><br/>Context</b></h3><p data-block-key="71u49">As part of the <a href="https://privacysandbox.com/intl/en_us/">Privacy Sandbox</a> initiative to keep people’s activity private and support free experiences for everyone, Chrome is <a href="https://privacysandbox.com/intl/en_us/open-web/#the-privacy-sandbox-timeline">phasing out support for third-party cookies</a>, subject to addressing any remaining concerns of the <a href="https://www.gov.uk/cma-cases/investigation-into-googles-privacy-sandbox-browser-changes">CMA</a>. Scaled testing began at 1% in January and will continue throughout the year.</p><p data-block-key="cmg87">GIS currently uses third-party cookies to allow users to sign up and sign in to websites easily and securely by reducing reliance on passwords. The <a href="https://fedidcg.github.io/FedCM/">FedCM API</a> is a new privacy-preserving alternative to third-party cookies for federated identity providers. It allows Google to continue providing a secure, streamlined experience for signing up and signing in to websites. Last August, the Google Identity team announced a <a href="https://developers.googleblog.com/2023/08/announcing-federated-credential-management-beta-for-gis.html">beta program</a> for developers to test the Chrome browser’s new FedCM API supporting GIS.</p><h2 data-block-key="3touv"><b><br/>What to Expect during the FedCM Migration</b></h2><p data-block-key="b5bqc">Partners who offer GIS’s One Tap and Automatic Sign-In features will automatically be migrated to FedCM in April. For most developers, this migration will occur seamlessly through backwards-compatible updates to the GIS JavaScript library; the GIS library will call the FedCM APIs behind the scenes, without requiring any developer changes. The new FedCM APIs have <a href="https://developers.google.com/identity/gsi/web/guides/automatic-sign-in-sign-out">minimal</a> impact to existing user flows.</p><h3 data-block-key="s5ja"><b><br/>Some Developers May be Required to Make Changes</b></h3><p data-block-key="dn59f">Some websites with custom integrations may require minor changes, such as updates to custom layouts or positioning of sign-in prompts. Websites using embedded iframes for sign-in or a non-compliant Content Security Policy may need to be updated. To learn if your website will require changes, please review the <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration">migration guide</a>. We encourage you to enable and experiment with FedCM, as previously announced through the <a href="https://developers.googleblog.com/2023/08/announcing-federated-credential-management-beta-for-gis.html">beta program</a>, to ensure flows will not be interrupted.</p><h2 data-block-key="51v6h"><b><br/>Migration Timeline</b></h2><p data-block-key="9ejth">If you are using GIS <a href="https://developers.google.com/identity/gsi/web/guides/features">One Tap</a> or <a href="https://developers.google.com/identity/gsi/web/guides/automatic-sign-in-sign-out">Automatic Sign-in</a> on your website, please be aware of the following timelines:</p><p data-block-key="fv6c2"></p><ul><li data-block-key="bamm7">January 2024: Chrome began <a href="https://blog.google/products/chrome/privacy-sandbox-tracking-protection/">scaled testing</a> of third-party cookie restrictions at 1%.</li></ul><p data-block-key="ec34t"></p><ul><li data-block-key="6if2s">April 2024: GIS begins a migration of all websites without <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration#cross_origin">cross-origin iframe</a> and/or <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration#csp">Content Security Policy</a> issues detected to FedCM on the Chrome browser.</li></ul><p data-block-key="919ii"></p><ul><li data-block-key="8q53q">July 2024: GIS begins migrating websites with <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration#cross_origin">cross-origin iframe</a> and/or <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration#csp">Content Security Policy</a> issues detected to FedCM on the Chrome browser.</li></ul><p data-block-key="1p27i"></p><ul><li data-block-key="2iqrf">October 2025: GIS begins migrating <b>all</b> One Tap traffic to FedCM</li></ul><p data-block-key="6hinn"></p><p data-block-key="7kcas">Once the Chrome browser restricts third-party cookies by default for all Chrome clients, the use of FedCM will be required for partners who use GIS One Tap and Automatic Sign-In features.</p><h2 data-block-key="f5f2o"><b><br/>FedCM Migration Checklist</b></h2><h3 data-block-key="1kl8h">Developers are encouraged to follow these steps to prepare for the upcoming migration:</h3><p data-block-key="6qj0m">✅ Be aware of migration plans and timelines that will affect your traffic. Determine your migration approach. Developers will be migrated by default starting in April.</p><p data-block-key="epdfv"><br/>✅ All developers should <a href="https://developers.google.com/privacy-sandbox/blog/psat-announcement">verify</a> that their website will be unaffected by the migration. <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration#fedcm_flag">Opt-in</a> to FedCM to test and make any necessary changes to ensure a smooth transition. For developers with implementations that require changes, make changes ahead of the migration deadline.</p><p data-block-key="ajk1e"><br/>✅ For developers that use Automatic Sign-In, review the <a href="https://developers.devsite.corp.google.com/identity/gsi/web/guides/fedcm-migration#auto_sign_in">FedCM changes to the user gesture requirement</a>. We recommend all automatic sign-in developers migrate to FedCM as soon as possible, to reduce disruption to automatic sign-in conversion rates.</p><p data-block-key="9i30b"><br/>✅ If you need more time to verify FedCM functionality on your site and make changes to your code, you can <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration#fedcm_flag">temporarily exempt</a> your traffic from using FedCM until February 2025.</p><p data-block-key="3nbb8"><br/>To get started and learn more about FedCM, visit our <a href="https://developers.google.com/identity/gsi/web/guides/fedcm-migration">developer site</a> and check out the <a href="https://stackoverflow.com/questions/tagged/google-signin">google-signin</a> tag on Stack Overflow for technical assistance. We invite developers to share their feedback with us at <a href="mailto:gis-fedcm-feedback@google.com">gis-fedcm-feedback@google.com</a>.</p> </div> </div> </section> <section class="navigation-container glue-page glue-spacer-6-top"> <div class="posted-in-section"> <div class="posted-in-section__heading"> <span class="glue-caption"> posted in: </span> </div> <div class="posted-in-section__tags"> <ul> <li> <a href="/en/search/?product_categories=Chrome+Web" class="glue-caption">Chrome Web</a> </li> <li> <a href="/en/search/?technology_categories=Web" class="glue-caption">Web</a> </li> <li> <a href="/en/search/?content_type_categories=How-To+Guides" class="glue-caption">How-To Guides</a> </li> <li> <a href="/en/search/?content_type_categories=Announcements" class="glue-caption">Announcements</a> </li> <li> <a href="/en/search/?content_type_categories=Best+Practices" class="glue-caption">Best Practices</a> </li> <li> <a href="/en/search/?content_type_categories=Problem-Solving" 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Federated Credential Management (FedCM) Migration for Google Identity Services - Google Developers Blog