Safari isn't alone in blocking third-party cookies to enhance user privacy. When a browser blocks third-party cookies to prevent user tracking, SPAs are also broken. Unfortunately, this pattern is also the standard way of implementing the implicit flow in single-page apps (SPAs). ITP blocks "third-party" cookies, cookies on requests that cross domains.Ī common form of user tracking is done by loading an iframe to third-party site in the background and using cookies to correlate the user across the Internet. What is Intelligent Tracking Protection (ITP)?Īpple Safari has an on-by-default privacy protection feature called Intelligent Tracking Protection, or ITP.
In the Microsoft identity platform, we use the authorization flow with Proof Key for Code Exchange (PKCE) and refresh tokens to keep users signed in when third-party cookies are blocked. This block breaks the implicit flow and requires new authentication patterns to successfully sign in users. Many browsers block third-party cookies, cookies on requests to domains other than the domain shown in the browser's address bar.
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