Authentication methods at Google

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href="/" class="devsite-site-logo-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Site logo" track-type="globalNav" track-name="googleCloud" track-metadata-position="nav" track-metadata-eventDetail="nav"> <picture> <img src="https://www.gstatic.com/devrel-devsite/prod/v870e399c64f7c43c99a3043db4b3a74327bb93d0914e84a0c3dba90bbfd67625/cloud/images/cloud-logo.svg" class="devsite-site-logo" alt="Google Cloud"> </picture> </a> <span class="devsite-product-name"> <ul class="devsite-breadcrumb-list" > <li class="devsite-breadcrumb-item "> </li> </ul> </span> </div> </div> <div class="devsite-book-nav-wrapper"> <div class="devsite-mobile-nav-top"> <ul class="devsite-nav-list"> <li class="devsite-nav-item"> <a href="/docs" class="devsite-nav-title gc-analytics-event devsite-nav-has-children devsite-nav-active" data-category="Site-Wide Custom Events" data-label="Tab: Documentation" track-name="docs-home" track-link-column-type="single-column" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Documentation" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Documentation </span> <span class="devsite-nav-icon material-icons" data-icon="forward" > </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/tech-area-overviews" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: Technology areas" track-name="technology-areas" track-link-column-type="single-column" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Technology areas" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Technology areas </span> </a> <ul class="devsite-nav-responsive-tabs devsite-nav-has-menu "> <li class="devsite-nav-item"> <span class="devsite-nav-title" tooltip data-category="Site-Wide Custom Events" data-label="Tab: Technology areas" track-name="technology-areas" track-link-column-type="single-column" > <span class="devsite-nav-text" tooltip menu="Technology areas"> More </span> <span class="devsite-nav-icon material-icons" data-icon="forward" menu="Technology areas"> </span> </span> </li> </ul> </li> <li class="devsite-nav-item"> <a href="/docs/cross-product-overviews" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: Cross-product tools" track-name="crossproduct" track-link-column-type="single-column" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Cross-product tools" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Cross-product tools </span> </a> <ul class="devsite-nav-responsive-tabs devsite-nav-has-menu "> <li class="devsite-nav-item"> <span class="devsite-nav-title" tooltip data-category="Site-Wide Custom Events" data-label="Tab: Cross-product tools" track-name="crossproduct" track-link-column-type="single-column" > <span class="devsite-nav-text" tooltip menu="Cross-product tools"> More </span> <span class="devsite-nav-icon material-icons" data-icon="forward" menu="Cross-product tools"> </span> </span> </li> </ul> </li> <li class="devsite-nav-item"> <a href="/" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: Related sites" track-name="related-sites" track-link-column-type="single-column" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Related sites" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Related sites </span> </a> <ul class="devsite-nav-responsive-tabs devsite-nav-has-menu "> <li class="devsite-nav-item"> <span class="devsite-nav-title" tooltip data-category="Site-Wide Custom Events" data-label="Tab: Related sites" track-name="related-sites" track-link-column-type="single-column" > <span class="devsite-nav-text" tooltip menu="Related sites"> More </span> <span class="devsite-nav-icon material-icons" data-icon="forward" menu="Related sites"> </span> </span> </li> </ul> </li> <li class="devsite-nav-item"> <a href="//console.cloud.google.com/" class="devsite-nav-title gc-analytics-event " track-metadata-eventDetail="nav" track-type="globalNav" referrerpolicy="no-referrer-when-downgrade" track-metadata-position="nav" track-name="console" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Console" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Console </span> </a> </li> <li class="devsite-nav-item"> <a href="/contact" class="cta-button-secondary button" data-overflow-wrapper="tab" track-metadata-eventDetail="nav" track-type="contact" track-metadata-position="nav" data-overflow="devsite-tabs-wrapper" data-overflow-container="left" track-name="sales" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Contact Us" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Contact Us </span> </a> </li> <li class="devsite-nav-item"> <a href="//console.cloud.google.com/freetrial" class="cloud-free-trial-button cta-button-primary button-primary button cloud-button cloud-button--primary" track-type="freeTrial" track-name="gcpCta" data-overflow-container="right" data-overflow-class="devsite-header-link devsite-top-button button cloud-free-trial-button cloud-free-trial-enabled cloud-button cloud-button--primary" track-metadata-position="nav" referrerpolicy="no-referrer-when-downgrade" track-metadata-eventDetail="nav" data-overflow="devsite-top-logo-row" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Start free" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Start free </span> </a> </li> </ul> </div> <div class="devsite-mobile-nav-bottom"> <ul class="devsite-nav-list" menu="_book"> <li class="devsite-nav-item"><a href="/docs" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs" alt-paths=" /security/deletion /security/data-loss-prevention /security/data-safety /security/encryption/customer-supplied-encryption-keys /security/encryption/default-encryption /security/encryption-in-transit/application-layer-transport-security /security/encryption-in-transit /security/incident-response /security/infrastructure/design /security/overview /security/overview/whitepaper /security/shielded-cloud /security/resources/security-features-of-connect-for-anthos "><span class="devsite-nav-text" tooltip>Documentation home</span></a></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>The basics</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/overview" ><span class="devsite-nav-text" tooltip>Google Cloud overview</span></a></li><li class="devsite-nav-item"><a href="/docs/cloud-approach-to-change" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/cloud-approach-to-change" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/cloud-approach-to-change" ><span class="devsite-nav-text" tooltip>Google Cloud's approach to change</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Plan resource creation</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/get-started/resource-planning-overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/get-started/resource-planning-overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/get-started/resource-planning-overview" ><span class="devsite-nav-text" tooltip>Resource planning overview</span></a></li><li class="devsite-nav-item"><a href="/docs/get-started/consider-geographic-distribution" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/get-started/consider-geographic-distribution" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/get-started/consider-geographic-distribution" ><span class="devsite-nav-text" tooltip>Consider geographic distribution</span></a></li><li class="devsite-nav-item"><a href="/docs/get-started/create-ownership-hierarchy" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/get-started/create-ownership-hierarchy" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/get-started/create-ownership-hierarchy" ><span class="devsite-nav-text" tooltip>Create an ownership hierarchy</span></a></li><li class="devsite-nav-item"><a href="/docs/get-started/consider-resource-maintenance" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/get-started/consider-resource-maintenance" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/get-started/consider-resource-maintenance" ><span class="devsite-nav-text" tooltip>Consider maintenance</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Google Cloud regions</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/geography-and-regions" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/geography-and-regions" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/geography-and-regions" ><span class="devsite-nav-text" tooltip>Geography and regions</span></a></li><li class="devsite-nav-item"><a href="/docs/dammam-region-access" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/dammam-region-access" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/dammam-region-access" ><span class="devsite-nav-text" tooltip>Dammam region access</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Interact with Google Cloud</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/get-started/interact-with-resources" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/get-started/interact-with-resources" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/get-started/interact-with-resources" ><span class="devsite-nav-text" tooltip>Interaction overview</span></a></li><li class="devsite-nav-item"><a href="/docs/accessibility" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/accessibility" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/accessibility" ><span class="devsite-nav-text" tooltip>Accessibility</span></a></li><li class="devsite-nav-item"><a href="/docs/shortcuts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/shortcuts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/shortcuts" ><span class="devsite-nav-text" tooltip>Keyboard shortcuts</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/billing/docs/concepts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /billing/docs/concepts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/billing/docs/concepts" ><span class="devsite-nav-text" tooltip>Learn about Cloud Billing</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Committed use discounts</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/cuds" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/cuds" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/cuds" ><span class="devsite-nav-text" tooltip>Overview</span></a></li><li class="devsite-nav-item"><a href="/docs/cuds-attribution" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/cuds-attribution" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/cuds-attribution" ><span class="devsite-nav-text" tooltip>Attribution of commitments</span></a></li><li class="devsite-nav-item"><a href="/docs/cuds-recommender" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/cuds-recommender" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/cuds-recommender" ><span class="devsite-nav-text" tooltip>Recommendations</span></a></li><li class="devsite-nav-item"><a href="/docs/cuds-spend-based" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/cuds-spend-based" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/cuds-spend-based" ><span class="devsite-nav-text" tooltip>Spend-based CUDs</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/free/docs/gcp-free-tier" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /free/docs/gcp-free-tier" track-type="bookNav" track-name="click" track-metadata-eventdetail="/free/docs/gcp-free-tier" ><span class="devsite-nav-text" tooltip>Google Cloud Free Program</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Get started with Google Cloud</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Google Cloud setup</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/enterprise/setup-checklist" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/enterprise/setup-checklist" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/enterprise/setup-checklist" ><span class="devsite-nav-text" tooltip>Checklist</span></a></li><li class="devsite-nav-item"><a href="/docs/enterprise/deploy-foundation-using-terraform-from-console" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/enterprise/deploy-foundation-using-terraform-from-console" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/enterprise/deploy-foundation-using-terraform-from-console" ><span class="devsite-nav-text" tooltip>Deploy using Terraform</span></a></li><li class="devsite-nav-item"><a href="/docs/enterprise/manage-foundation" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/enterprise/manage-foundation" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/enterprise/manage-foundation" ><span class="devsite-nav-text" tooltip>Extend your setup</span></a></li></ul></div></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Developer tools and APIs</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/get-started/access-apis" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/get-started/access-apis" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/get-started/access-apis" ><span class="devsite-nav-text" tooltip>Set up API access</span></a></li><li class="devsite-nav-item"><a href="/docs/get-started/developer-tools" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/get-started/developer-tools" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/get-started/developer-tools" ><span class="devsite-nav-text" tooltip>Use developer tools</span></a></li></ul></div></li><li class="devsite-nav-item"><a href="/docs/get-started/aws-azure-gcp-service-comparison" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/get-started/aws-azure-gcp-service-comparison" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/get-started/aws-azure-gcp-service-comparison" ><span class="devsite-nav-text" tooltip>Compare AWS and Azure services to Google Cloud</span></a></li><li class="devsite-nav-item"><a href="/architecture/framework" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /architecture/framework" track-type="bookNav" track-name="click" track-metadata-eventdetail="/architecture/framework" ><span class="devsite-nav-text" tooltip>Architecture Framework</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>General security guides</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/security" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/security" ><span class="devsite-nav-text" tooltip>All general security guides</span></a></li><li class="devsite-nav-item"><a href="/docs/security/overview/whitepaper" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security/overview/whitepaper" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/security/overview/whitepaper" ><span class="devsite-nav-text" tooltip>Security overview</span></a></li><li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>Infrastructure security</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/security/infrastructure/design" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security/infrastructure/design" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/security/infrastructure/design" ><span class="devsite-nav-text" tooltip>Infrastructure security design overview</span></a></li><li class="devsite-nav-item"><a href="/docs/security/beyondprod" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security/beyondprod" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/security/beyondprod" ><span class="devsite-nav-text" tooltip>BeyondProd</span></a></li><li class="devsite-nav-item"><a href="/docs/security/binary-authorization-for-borg" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security/binary-authorization-for-borg" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/security/binary-authorization-for-borg" ><span class="devsite-nav-text" tooltip>Binary Authorization for Borg</span></a></li><li class="devsite-nav-item"><a href="/docs/security/boot-integrity" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security/boot-integrity" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/security/boot-integrity" ><span class="devsite-nav-text" tooltip>Boot integrity</span></a></li><li class="devsite-nav-item"><a href="/docs/security/physical-to-logical-space" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security/physical-to-logical-space" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/security/physical-to-logical-space" ><span class="devsite-nav-text" tooltip>Data center physical-to-logical space</span></a></li><li class="devsite-nav-item"><a href="/docs/security/remote-attestation" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security/remote-attestation" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/security/remote-attestation" ><span class="devsite-nav-text" tooltip>Remote attestation</span></a></li><li class="devsite-nav-item"><a href="/docs/security/production-services-protection" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/security/production-services-protection" track-type="bookNav" track-name="click" 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slot="popout-heading"> Stay organized with collections </span> <span slot="popout-contents"> Save and categorize content based on your preferences. </span> </devsite-feature-tooltip> <div class="devsite-page-title-meta"><devsite-view-release-notes></devsite-view-release-notes></div> <devsite-toc class="devsite-nav" depth="2" devsite-toc-embedded > </devsite-toc> <div class="devsite-article-body clearfix "> <p>This document helps you understand some key authentication methods and concepts, and where to get help with implementing or troubleshooting authentication. The primary focus of the authentication documentation is for Google Cloud services, but the list of <a href="/docs/authentication/use-cases">authentication use cases</a> and the introductory material on this page includes use cases for other Google products as well. <h2 id="introduction" data-text="Introduction" tabindex="-1">Introduction</h2> <p>Authentication is the process by which your identity is confirmed through the use of some kind of <a href="#credentials">credential</a>. Authentication is about proving that you are who you say you are.</p> <p>Google provides many APIs and services, which require authentication to access. Google also provides a number of services that host applications written by our customers; these applications also need to determine the identity of their users.</p> <h2 id="quick-links" data-text="How to get help with authentication" tabindex="-1">How to get help with authentication</h2> <table> <tr> <th>I want to...</th> <th>Information</th> </tr> <tr> <td> Authenticate to a Google Cloud service from my application using a high-level programming language. </td> <td> <a href="/docs/authentication/provide-credentials-adc">Set up Application Default Credentials</a>, and then use one of the <a href="/docs/authentication/client-libraries">Cloud Client Libraries</a>. </td> </tr> <tr> <td> Authenticate to an application that requires an ID token. </td> <td> <a href="/docs/authentication/get-id-token">Get an OpenID Connect (OIDC) ID token</a> and provide it with your request. </td> </tr> <tr> <td> Implement user authentication for an application that accesses Google or Google Cloud services and resources. </td> <td> See <a href="/docs/authentication/use-cases#app-users">Authenticate application users</a> for a comparison of options. </td> </tr> <tr> <td> Try out some <code translate="no" dir="ltr">gcloud</code> commands in my local development environment. </td> <td> <a href="/docs/authentication/gcloud">Initialize the gcloud CLI</a>. </td> </tr> <tr> <td> Try out some Google Cloud REST API requests in my local development environment. </td> <td> Use a command-line tool such as <code translate="no" dir="ltr">curl</code> to <a href="/docs/authentication/rest">call the REST API</a>. </td> </tr> <tr> <td> Try out a code snippet included in my product documentation. </td> <td> <a href="/docs/authentication/provide-credentials-adc#local-dev">Set up Application Default Credentials locally</a>, and install your product's client library in your local environment. The client library <a href="/docs/authentication/client-libraries">finds your credentials automatically</a>. </td> </tr> <tr> <td>Get help with another authentication use case.</td> <td> See the <a href="/docs/authentication/use-cases">Authentication use cases</a> page. </tr> <tr> <td>See a list of the products Google provides in the identity and access management space. </td> <td> See the <a href="/docs/authentication/identity-products">Google identity and access management products</a> page. </td> </tr> </table> <h2 id="auth-decision-tree" data-text="Choose the right authentication method for your use case" tabindex="-1">Choose the right authentication method for your use case</h2> <p> When you access Google Cloud services by using the Google Cloud CLI, Cloud Client Libraries, tools that support <a href="/docs/authentication/application-default-credentials"> Application Default Credentials (ADC)</a> like Terraform, or REST requests, use the following diagram to help you choose an authentication method: </p> <img src="/static/docs/authentication/images/authn-tree.svg" alt="Decision tree for choosing authentication method based on use case"> <p> This diagram guides you through the following questions: </p> <ol> <li> Are you running code in a single-user development environment, such as your own workstation, Cloud Shell, or a virtual desktop interface? <ol> <li>If yes, proceed to question 4.</li> <li>If no, proceed to question 2.</li> </ol> </li> <li>Are you running code in Google Cloud? <ol> <li>If yes, proceed to question 3.</li> <li>If no, proceed to question 5.</li> </ol> </li> <li>Are you running containers in Google Kubernetes Engine or GKE Enterprise? <ol> <li> If yes, use <a href="/kubernetes-engine/docs/how-to/workload-identity#authenticating_to"> workload identity federation for GKE</a> to attach service accounts to Kubernetes pods. </li> <li> If no, <a href="/iam/docs/attach-service-accounts#attaching-to-resources">attach a service account</a> to the resource. </li> </ol> </li> <li> <p>Does your use case require a service account?</p> <p> For example, you want to configure authentication and authorization consistently for your application across all environments. </p> <ol> <li> If no, <a href="/docs/authentication/provide-credentials-adc#local-user-cred">authenticate with user credentials</a>. </li> <li> If yes, <a href="/docs/authentication/use-service-account-impersonation"> impersonate a service account with user credentials</a>. </li> </ol> </li> <li> Does your workload authenticate with an external identity provider that supports <a href="/iam/docs/workload-identity-federation#providers">workload identity federation</a>? <ol> <li> If yes, <a href="/iam/docs/workload-identity-federation-with-other-clouds"> configure workload identity federation</a> to let applications running on-premises or on other cloud providers use a service account. </li> <li> If no, <a href="/docs/authentication/provide-credentials-adc#local-key">create a service account key</a>. </li> </ol> </li> </ol> <h2 id="oauth2" data-text="OAuth 2.0" tabindex="-1">OAuth 2.0</h2> <p>Google APIs implement and extend the <a href="https://datatracker.ietf.org/doc/html/rfc6749">OAuth 2.0 framework</a>. See the documentation for your environment and use case for details.</p> <h2 id="authorization-gcp" data-text="Authorization methods for Google Cloud services" tabindex="-1">Authorization methods for Google Cloud services</h2> <p>Google Cloud services use <a href="/iam/docs/overview">Identity and Access Management (IAM)</a> for authentication. IAM offers granular control, by principal and by resource. When you authenticate to Google Cloud services, you generally use a scope that includes all Google Cloud services (<code translate="no" dir="ltr">https://www.googleapis.com/auth/cloud-platform</code>).</p> <p>OAuth 2.0 scopes can provide a second layer of protection, which is useful if your code is running in an environment where token security is a concern, such as a mobile app. In this scenario, you can use finer-grained scopes to reduce risk in the event of a compromised token. You can find the list of scopes accepted by an API method in its API reference pages in the product documentation.</p> <h2 id="adc" data-text="Application Default Credentials" tabindex="-1">Application Default Credentials</h2> <p> <a href="/docs/authentication/application-default-credentials">Application Default Credentials (ADC)</a> is a strategy used by the authentication libraries to automatically find credentials based on the application environment. The authentication libraries make those credentials available to <a href="/apis/docs/client-libraries-explained">Cloud Client Libraries and Google API Client Libraries</a>. When you use ADC, your code can run in either a development or production environment without changing how your application authenticates to Google Cloud services and APIs. </p> <p>If you are writing code that needs to use Google Cloud services, you should use ADC whenever possible. Using ADC can simplify your development process, because it lets you use the same authentication code in a variety of environments.</p> <p>Before you can use ADC, <a href="/docs/authentication/provide-credentials-adc">you must provide your credentials to ADC</a>, based on where you want your code to run. ADC <a href="/docs/authentication/application-default-credentials">automatically locates credentials</a> and gets a token in the background, enabling your authentication code to run in different environments without modification. For example, the same version of your code could authenticate with Google Cloud APIs when running on a development workstation or on Compute Engine.</p> <p> Your gcloud credentials are not the same as the credentials you provide to ADC using the gcloud CLI. For more information, see <a href="/docs/authentication/gcloud#gcloud-credentials"> gcloud CLI authentication configuration and ADC configuration</a>. </p> <h2 id="terminology" data-text="Terminology" tabindex="-1">Terminology</h2> <p>The following terms are important to understand when discussing authentication and authorization.</p> <h3 id="authentication" data-text="Authentication" tabindex="-1">Authentication</h3> <p>Authentication is the process of determining the identity of the principal attempting to access a resource.</p> <h3 id="authorization" data-text="Authorization" tabindex="-1">Authorization</h3> <p>Authorization is the process of determining whether the principal or application attempting to access a resource has been authorized for that level of access.</p> <h3 id="credentials" data-text="Credentials" tabindex="-1">Credentials</h3> <p> When this document uses the term <em>user account</em>, it refers to a Google Account, or a user account managed by your identity provider and federated with <a href="/iam/docs/workforce-identity-federation">workforce identity federation</a>. </p> <p>For authentication, credentials are a digital object that provide proof of identity. Passwords, PINs, and biometric data can all be used as credentials, depending on the application requirements. For example, when you log into your user account, you provide your password and satisfy any two-factor authentication requirement as proof that the account in fact belongs to you, and you are not being spoofed by a bad actor.</p> <p><a href="#token">Tokens</a> are sometimes referred to as credentials, but for this documentation, they are instead referred to as a digital object that proves that the caller provided proper credentials, but they are not credentials themselves.</p> <p>The type of credential you need to provide depends on what you are authenticating to. The following types of credentials can be created in the Google Cloud console:</p> <ul> <li><p>API keys</p> <p> Unlike other credentials, API keys do not identify a <a href="#principal">principal</a>. API keys provide a Google Cloud project for billing and quota purposes. </p> <p> Many Google APIs do not accept API keys. For more information about API keys, see <a href="/docs/authentication/api-keys">API keys</a>. </p> </li> <li><p>OAuth Client IDs</p> <p> OAuth Client IDs are used to identify an application to Google Cloud. This is necessary when you want to access resources owned by your end users, also called three-legged OAuth (3LO). For more information about how to get and use an OAuth Client ID, see <a href="https://support.google.com/cloud/answer/6158849"> Setting up OAuth 2.0</a>. </p> </li> <li><p>Service account keys</p> <p> Service account keys identify a principal (the service account) and the project associated with the service account. </p> <aside class="note"><b>Note:</b> Service account keys are a security risk if not managed correctly. You should <a href="/docs/authentication#auth-decision-tree"> choose a more secure alternative to service account keys</a> whenever possible. If you must authenticate with a service account key, you are responsible for the security of the private key and for other operations described by <a href="/iam/docs/best-practices-for-managing-service-account-keys"> Best practices for managing service account keys</a>. If you are prevented from creating a service account key, service account key creation might be disabled for your organization. For more information, see <a href="/resource-manager/docs/secure-by-default-organizations"> Managing secure-by-default organization resources</a>. </aside> </li> </ul> <h3 id="principal" data-text="Principal" tabindex="-1">Principal</h3> <p>A principal is an identity that can be granted access to a resource. For authentication, Google APIs support two types of principals: <a href="#user-accounts">user accounts</a> and <a href="#service-accounts">service accounts</a>.</p> <p>Whether you use a user account or a service account to authenticate depends on your use case. You might use both, each at different stages of your project or in different development environments.</p> <h4 id="user-accounts" data-text="User accounts" tabindex="-1">User accounts</h4> <p>User accounts represent a developer, administrator, or any other person who interacts with Google APIs and services.</p> <p>User accounts are managed as <a href="https://accounts.google.com/">Google Accounts</a>, either with <a href="https://workspace.google.com/">Google Workspace</a> or <a href="/identity">Cloud Identity</a>. They can also be user accounts that are managed by a third-party identity provider and federated with <a href="/iam/docs/workforce-identity-federation">Workforce Identity Federation</a>. <p>With a user account, you can authenticate to Google APIs and services in the following ways:</p> <ul> <li>Use the gcloud CLI to <a href="/docs/authentication/provide-credentials-adc#local-user-cred">set up Application Default Credentials (ADC)</a>.</li> <li>Use your user credentials to <a href="/docs/authentication/gcloud">sign in to the Google Cloud CLI</a>, and then use the tool to access Google Cloud services.</li> <li>Use your user credentials to <a href="/docs/authentication/use-service-account-impersonation">impersonate a service account</a>.</li> <li>Use your user credentials to <a href="/docs/authentication/gcloud">sign in to the Google Cloud CLI</a>, and then use the tool to <a href="/docs/authentication/rest">generate access tokens</a>.</li> </ul> <p>For an overview of ways to configure identities for users in Google Cloud, see <a href="/iam/docs/user-identities">Identities for users</a>.</p> <h4 id="service-accounts" data-text="Service accounts" tabindex="-1">Service accounts</h4> <p><a href="/iam/docs/service-account-overview">Service accounts</a> are accounts that do not represent a human user. They provide a way to manage authentication and authorization when a human is not directly involved, such as when an application needs to access Google Cloud resources. Service accounts are managed by IAM.</p> <p>The following list provides some methods for using a service account to authenticate to Google APIs and services, in order from most secure to least secure. For more information, see <a href="#auth-decision-tree">Choose the right authentication method for your use case</a> on this page.</p> <ul> <li><p><a href="/docs/authentication/provide-credentials-adc#attached-sa">Attach a user-managed service account to the resource</a> and <a href="/docs/authentication/client-libraries">use ADC to authenticate</a>.</p> <p>This is the recommended way to authenticate production code running on Google Cloud.</p></li> <li><p><a href="/iam/docs/create-short-lived-credentials-direct">Use a service account to impersonate another service account</a>.</p> <p>Service account impersonation lets you temporarily grant more privileges to a service account. Granting extra privileges on a temporary basis enables that service account to perform the required access without having to permanently acquire more privilege.</p></li> <li><p>Use <a href="/iam/docs/workload-identity-federation">Workload Identity Federation</a> to authenticate workloads that run on-premises or on a different cloud provider.</p></li> <li><p>Use the <a href="/iam/docs/service-account-types#default">default service account</a>.</p> <p>Using the default service account is not recommended, because by default the default service account is highly privileged, which violates the <a href="/iam/docs/using-iam-securely#least_privilege">principle of least privilege</a>.</p></li> <li><p><a href="/docs/authentication/provide-credentials-adc#local-key">Use a service account key</a>.</p> <aside class="note"><strong>Note:</strong><span> Service account keys are a security risk if not managed correctly. You should <a href="/docs/authentication#auth-decision-tree"> choose a more secure alternative to service account keys</a> whenever possible. If you must authenticate with a service account key, you are responsible for the security of the private key and for other operations described by <a href="/iam/docs/best-practices-for-managing-service-account-keys"> Best practices for managing service account keys</a>. If you are prevented from creating a service account key, service account key creation might be disabled for your organization. For more information, see <a href="/resource-manager/docs/secure-by-default-organizations"> Managing secure-by-default organization resources</a>. </span></aside></li> </ul> <p>For an overview of ways to configure workload identities, including service accounts, for Google Cloud, see <a href="/iam/docs/workload-identities">Identities for workloads</a>. For best practices, see <a href="/iam/docs/best-practices-service-accounts">Best practices for using service accounts</a>.</p> <h3 id="token" data-text="Token" tabindex="-1">Token</h3> <p>For authentication and authorization, a token is a digital object that shows that a caller provided proper credentials that were exchanged for that token. The token contains information about the identity of the principal making the request and what kind of access they are authorized to make.</p> <p>Tokens can be thought of as being like hotel keys. When you check in to a hotel and present the proper documentation to the hotel registration desk, you receive a key that gives you access to specific hotel resources. For example, the key might give you access to your room and the guest elevator, but would not give you access to any other room or the service elevator.</p> <p>With the exception of API keys, Google APIs do not support credentials directly. Your application must acquire or generate a token and provide it to the API. There are several different types of tokens. For more information, see <a href="/docs/authentication/token-types">Token types</a>.</p> <h3 id="workload-workforce" data-text="Workload and workforce" tabindex="-1">Workload and workforce</h3> <p>Google Cloud identity and access products enable access to Google Cloud services and resources for both programmatic access and human users. Google Cloud uses the terms <em>workload</em> for programmatic access and <em>workforce</em> for user access.</p> <p><a href="/iam/docs/workload-identity-federation">Workload Identity Federation</a> lets you provide access to on-premises or multi-cloud workloads without having to create and manage service account keys.</p> <p><a href="/iam/docs/workforce-identity-federation">Workforce Identity Federation</a> lets you use an external identity provider to authenticate and authorize a workforce—a group of users, such as employees, partners, and contractors—using IAM, so that the users can access Google Cloud services.</p> <h2 id="whats_next" data-text="What's next" tabindex="-1">What's next</h2> <ul> <li>Learn more about how Google Cloud services <a href="/iam/docs/overview">use IAM to control access to Google Cloud resources</a>.</li> <li>Understand <a href="/docs/authentication/application-default-credentials">how Application Default Credentials works</a>, and <a href="/docs/authentication/provide-credentials-adc">how you can set it up for a variety of development environments</a>.</li> </ul> <devsite-hats-survey class="nocontent" hats-id="Nd7nTix2o0eU5NUYprb0ThtUc5jf" listnr-id="83405"></devsite-hats-survey> </div> <devsite-thumb-rating position="footer"> </devsite-thumb-rating> <devsite-feedback position="footer" project-name="Authentication" product-id="5152837" bucket="Auth Docs" context="" version="t-devsite-webserver-20241114-r00-rc02.464922260396498922" data-label="Send Feedback Button" track-type="feedback" track-name="sendFeedbackLink" track-metadata-position="footer" class="nocontent" project-icon="https://www.gstatic.com/devrel-devsite/prod/v870e399c64f7c43c99a3043db4b3a74327bb93d0914e84a0c3dba90bbfd67625/cloud/images/favicons/onecloud/super_cloud.png" > <button> Send feedback </button> </devsite-feedback> <div class="devsite-floating-action-buttons"> </div> </article> <devsite-content-footer class="nocontent"> <p>Except as otherwise noted, the content of this page is licensed under the <a href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 License</a>, and code samples are licensed under the <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache 2.0 License</a>. 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