General: Forums topic: Privacy & Security Privacy Resources Security Resources Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com"

We are using SecPKCS12Import C API in our application to import a self seigned public key certificate. We tried to run the application for the first time on Tahoe and it failed with OSStatus -26275 error. The release notes didn't mention any deprecation or change in the API as per https://developer.apple.com/documentation/macos-release-notes/macos-26-release-notes. Are we missing anything? There are no other changes done to our application.

I would like to make an app that uses Sign in with Apple to provide the users with a very convenient way of authenticating their (anonymous) identity. I'm using the identityToken that the SignInWithAppleButton provides to the onCompletion closure to build an AWS Identity Resolver that will be used to access AWS resources for that user. At the moment, everything works fine, except that the identityToken eventually stops working (I think after 24 hours) and is no longer usable for AWS identity resolvers. Is there a way to refresh the identityToken, or to generate a new one, without user interaction? I don't mind at all, if in some situations (eg logout from another device, deletion of account, etc), it cannot refresh the token, and it directs me to take further action by giving an error. Most importantly, I don't want the user to be forced to deal with the SignInWithAppleButton every time that they interact with web services. From the user's point of view, I would like the experience to be that they simply confirm that they agree to use SignInWithApple on first use (maybe once per device), and are never inconvenienced by it again. P.S. Sorry for posting this here. I tried to set the topic to "Privacy & Security" and ran into form validation errors.

Can a macOS Platform SSO extension reliably identify the original app behind a Safari or ASWebAuthenticationSession-mediated request, or does ASAuthorizationProviderExtensionAuthorizationRequest only expose the immediate caller such as Safari ? We are seeing: callerBundleIdentifier = com.apple.Safari callerTeamIdentifier = Apple audit-token-based validation also resolves to Safari So the question is whether this is the expected trust model, and if so, what Apple-recommended mechanism should be used to restrict SSO participation to approved apps when the flow is browser-mediated.

Hi Apple Devs, For our app, we utilize passkeys for account creation (not MFA). This is mainly for user privacy, as there is 0 PII associated with passkey account creation, but it additionally also satisfies the 4.8: Login Services requirement for the App Store. However, we're getting blocked in Apple Review. Because the AASA does not get fetched immediately upon app install, the reviewers are not able to create an account immediately via passkeys, and then they reject the build. I'm optimistic I can mitigate the above. But even if we pass Apple Review, this is a pretty catastrophic issue for user security and experience. There are reports that 5% of users cannot create passkeys immediately (https://developer.apple.com/forums/thread/756740). That is a nontrivial amount of users, and this large of an amount distorts how app developers design onboarding and authentication flows towards less secure experiences: App developers are incentivized to not require MFA setup on account creation because requiring it causes significant churn, which is bad for user security. If they continue with it anyways, for mitigation, developers are essentially forced to add in copy into their app saying something along the lines of "We have no ability to force Apple to fetch the config required to continue sign up, so try again in a few minutes, you'll just have to wait." You can't even implement a fallback method. There's no way to check if the AASA is available before launching the ASAuthorizationController so you can't mitigate a portion of users encountering an error!! Any app that wants to use the PRF extension to encrypt core functionality (again, good for user privacy) simply cannot exist because the app simply does not work for an unspecified amount of time for a nontrivial portion of users. It feels like a. Apple should provide a syscall API that we can call to force SWCD to verify the AASA or b. implement a config based on package name for the app store such that the installation will immediately include a verified AASA from Apple's CDN. Flicking the config on would require talking with Apple. If this existed, this entire class of error would go away. It feels pretty shocking that there isn't a mitigation in place for this already given that it incentivizes app developers to pursue strictly less secure and less private authentication practices.

We're integrating Sign in with Apple into our iOS app The Apple ID login UI appears correctly on real devices, but after tapping Continue, the system immediately stops and shows code 1001. This issue happens across multiple devices and Apple ID accounts, even with no prior login history. We’ve confirmed the following Sign in with Apple is enabled in both Developer Portal and Xcode Capabilities Automatic signing and provisioning are set correctly Device is signed into iCloud and system time is synced Performed clean build, app reinstall, and other standard debugging steps We suspect that the sign in handshake process may not be completing properly due to some kind of account or server-side restriction, and we’d appreciate any insights into this behavior.

I have an Autofill Passkey Provider working for Safari and Chrome via WebAuthn protocol. Unfortunately, Chrome will not offer my extension as a logon credential provider unless I add the credential to the ASCredentialIdentityStore. I wonder what is the best way to access the ASCredentialIdentityStore from an AutoFill extension? I understand I cannot access it directly from the extension context, so what is the best way to trigger my container app to run, based on a new WebAuthn registration? The best I can think of so far is for the www site to provide an App Link to launch my container app as part of the registration ceremony. Safari will offer my extension even without adding it to the ASCredentialIdentityStore, so I guess I should file a request with Chrome to work this way too, given difficulty of syncing ASCredentialIdentityStore with WebAuthn registration.

We’ve identified an issue in our app where, upon clicking the "Call Customer Center" button, users are unexpectedly shown a logo and message option on a native pop-up window. However, this wasn't the case before, and it should only display a phone number to dial, which was given inside our code. This is incorrect and misleading for our users, as: We are a Canadian-based service and have no affiliation with US messaging chat. The messaging feature was never enabled or intended for our app. Our app should only initiate a phone call to our customer support center — no messages or branding from third parties should appear

Steps to reproduce: register a passkey on device A authenticate on device A, using the prf extension and a constant salt. Note the prf output go to device B. wait for iCloud sync authenticate on device B using the prf extension and the same constant salt. Note the prf output The prf outputs are different. Note: Repeat the authentication on each device. The prf output is identical for a given device, which seems to point towards the inclusion of a device specific component in the prf derivation. In my scenario, I need the prf output to be the same regardless of the device since I use it as the recovery key for my app data. Could you confirm that this is the expected behavior or not? Thanks,

Hi, we are having Sign in with Apple issues. For a large % of new users on our app which select this option, the first name and last name values are not being passed to us. This is the case in both scenarios - where the user shares their email address or hides it, and happens on iPhone when the user selects the default iCloud account. We're unclear why this is occurring.

hello, I'm writing to seek clarification on Apple account security, particularly regarding potential risks of compromise, implemented safeguards, and residual risks with corresponding mitigation strategies. We would appreciate your insights on the following specific points: iCloud Keychain Access: Is an Apple ID login strictly required to access iCloud Keychain? We understand that a compromise of iCloud Keychain is unlikely unless a malicious actor successfully takes over the legitimate user's Apple ID. Is this understanding correct? Passkey Theft Methods and Protections: What are the conceivable methods a malicious actor might employ to steal a legitimate user's passkey, and how are these attempts protected against? Impact of Apple ID Compromise on Passkeys: If a malicious actor successfully compromises a legitimate user's Apple ID, is it accurate to assume that the legitimate user's passkeys would then synchronize to the attacker's device, potentially allowing them to log in using their own biometrics? Authorization Flow on Legitimate User's Device: Could you please detail the authorization flow that occurs on the legitimate user's device? We are particularly interested in the types of authentication involved and the conditions under which they are triggered. Detection and Additional Authentication for Unauthorized Login: How are attempts to log in to an Apple ID from an unrecognized device or browser detected, and what additional authentication steps are implemented in such scenarios? Thank you for your time and assistance in addressing these important security questions.

Hello Apple Developer Community and Support, Our team is encountering a critical and persistent issue with our backend integration of Sign In with Apple, and we are hoping for some insights or assistance. Problem: We consistently receive an "invalid_client" error (HTTP 400 status) when our backend service attempts to exchange the authorization code for tokens at Apple's https://appleid.apple.com/auth/token endpoint. The error message from Apple's response is simply {"error":"invalid_client"}. Our Setup: Client Application: An iOS native application. Backend Service: A Go backend responsible for server-to-server token exchange and user management. Sign In with Apple Flow: The iOS app initiates the Sign In with Apple flow, obtains an authorization code, and then passes this code to our backend for token exchange. Extensive Troubleshooting Performed (No Success): We have meticulously followed all official Apple documentation (including TN3107: Resolving Sign In with Apple Response Errors) and industry best practices. Here's a summary of our verification steps, all of which currently show correct configurations and parameters: Backend client_secret JWT Construction: We generate a client_secret JWT as required for server-to-server communication. We've confirmed the claims in the generated JWT are correct: iss (Issuer): Our Team ID (e.g., XXXXXXXXXX). sub (Subject): Our Service ID (e.g., com.example.service.backendauth). aud (Audience): https://appleid.apple.com. kid (Key ID): The Key ID associated with our .p8 private key (e.g., YYYYYYYYYY). We have performed rigorous verification of the .p8 private key content itself, ensuring no corruption, extra characters, or formatting issues in the environment variable. Our backend logs confirm it's parsing the correct PEM content. Token Exchange Request Parameters: The client_id parameter sent in the POST request to /auth/token is correctly set to our App Bundle ID (e.g., com.example.app.ios), as this is the identifier for which the code was originally issued. The redirect_uri parameter sent in the POST request to /auth/token is precisely matched to a registered "Return URL" in our Apple Developer Portal (e.g., https://api.example.com:port/api/auth/callback?provider=apple). Apple Developer Portal Configuration (Meticulously Verified): App ID: Enabled for "Sign In with Apple". Service ID: Enabled for "Sign In with Apple". Its "Primary App ID" is correctly linked to our App Bundle ID (e.g., com.example.app.ios). Its "Return URLs" exactly match our backend's redirect_uri (e.g., https://api.example.com:port/api/auth/callback?provider=apple). Key: Our .p8 key has "Sign In with Apple" enabled. Crucially, in its configuration panel, the "Primary App ID" is correctly linked to our App Bundle ID (e.g., com.example.app.ios). We've ensured this key is specifically created for "Sign In with Apple" and not other services like APNs. We have performed multiple full revocations and meticulous re-creations of the App ID, Service ID, and Key in the Apple Developer Portal, ensuring correct linkages and using new identifiers to bypass any potential caching issues. Network & System Health Checks: Network connectivity from our backend server to https://appleid.apple.com (port 443) has been confirmed as fully functional via ping and curl -v. The incoming TLS handshake from our iOS client app to our backend server's callback URL (https://api.example.com:port/...) is successful and verified via openssl s_client -connect. There are no longer any TLS handshake errors (EOF). Our backend server's system clock is accurately synchronized via NTP. Request for Assistance: Given that all our visible configurations, environment variables, and request parameters appear to be correct and align with Apple's documentation, and network connectivity is confirmed, we are at a loss for why the invalid_client error persists. Based on TN3107, this error typically implies an issue with the client secret's signature or its validity for the given client_id. However, our logs confirm correct iss, sub, aud, and kid, and the private key content. Has anyone encountered this persistent invalid_client error when all checks pass? Are there any less common configurations or troubleshooting steps we might be missing? Could this indicate a caching or propagation delay on Apple's servers, even after waiting periods? Any insights or guidance would be greatly appreciated. We are prepared to provide detailed, anonymized logs and screenshots to Apple Developer Support privately if requested. Thank you.

As I had mentioned earlier, I was facing two issues after the initial update, but I’m happy to inform you that both of those issues have now been resolved. However, after updating to iOS 26.0 (23A5297m), I’ve started experiencing a new issue related to overheating. Since yesterday, my iPhone has been getting extremely hot while charging. It also became very hot after clicking just a few photos. The same heating issue occurred again today during charging. This problem only started after the latest update. Kindly look into this issue and advise on how to resolve it.

I have a very basic binary question around passkeys. Assuming everything is on latest and greatest version with respect to iOS, when user starts creating a passkey in platform-authenticator i.e., iCloudKeyChain (Apple Password Manager) , will iCloudKeyChain create a hardware-bound passkey in secure-enclave i.e., is brand new key-pair created right inside Secure-enclave ? OR will the keypair be created in software i.e., software-bound-passkey ?? i.e., software-bound keypair and store the private-key locally in the device encrypted with a key that is of course created in secure-enclave.

Hello, We are working on integrating app integrity verification into our service application, following Apple's App Attest and DeviceCheck guide. Our server issues a challenge to the client, which then sends the challenge, attestation, and keyId in CBOR format to Apple's App Attest server for verification. However, we are unable to reach both https://attest.apple.com and https://attest.development.apple.com due to network issues. These attempts have been made from both our internal corporate network and mobile hotspot environments. Despite adjusting DNS settings and other configurations, the issue persists. Are there alternative methods or solutions to address this problem? Any recommended network configurations or guidelines to successfully connect to Apple's App Attest servers would be greatly appreciated. Thank you.

Hi, We are operating a service that uses Sign in with Apple for user registration and login. As part of our security incident response and periodic security improvements, we are planning to rotate the private key used to generate the client secret (JWT) for Sign in with Apple. I have read the Human Interface Guidelines and the AuthenticationServices documentation, but I could not find a clear description of the behavior and user impact when rotating this private key. I would like to ask the following questions: Background: We issue a Sign in with Apple private key (with a Key ID) in our Apple Developer account. Our server uses this private key to generate the client secret (JWT). This is used for Sign in with Apple login on our web / mobile app. We are planning to invalidate the existing private key and switch to a newly issued one. Questions: Impact on existing logged-in sessions Will rotating the private key force already logged-in users (who previously signed in with Apple) to be logged out from our service? Can the user identifier (such as the "sub" claim) for existing Sign in with Apple users change due to key rotation? Recommended frequency and best practices Does Apple recommend rotating this private key only when it is compromised, or on a regular basis? If there are any official documents or examples that describe how to safely perform key rotation in production, we would appreciate a pointer. Impact on marketing / analytics We are using user IDs (linked via Sign in with Apple) for analytics and marketing attribution. Is there any expected impact on such use cases caused by rotating the private key? For example, is there any possibility that user identifiers change as a result of key rotation, or anything we should be careful about from a data linkage perspective? Our goal is to rotate the private key in a secure way without causing service downtime, mass logouts, or loss of account linkage. If there is already an official document that covers this, please let me know the URL. Thank you in advance.

I keep getting the following error when trying to run Passkey sign in on macOS. Told not to present authorization sheet: Error Domain=com.apple.AuthenticationServicesCore.AuthorizationError Code=1 "(null)" ASAuthorizationController credential request failed with error: Error Domain=com.apple.AuthenticationServices.AuthorizationError Code=1004 "(null)" This is the specific error. Application with identifier a is not associated with domain b I have config the apple-app-site-association link and use ?mode=developer Could there be any reason for this?

Hello, We are reaching out as a company providing Wi-Fi connectivity services through captive portals to report a potential issue identified after upgrading to iOS 26. Since the release of this version, we have received multiple reports from customers who are unable to complete the authentication process on captive portal networks. The observed behavior is as follows: The device correctly detects the Wi-Fi network. The connection is established at the link level, but after entering access credentials and proceeding to the next login step, an “error opening page” message is consistently displayed. When the user taps “OK,” the captive portal mini-browser closes. As a result, the user is unable to authenticate or gain internet access. We have verified that: Our network infrastructure and captive portals function correctly on other operating systems (Android, Windows, and previous iOS versions). No recent changes have been made to our platforms that could explain this behavior. The issue appears to be consistently reproducible on devices running iOS 26. Additionally, we have identified similar reports from users in public communities like reddit, suggesting this is not an isolated case. https://www.reddit.com/r/ios/comments/1no4vzt/switched_to_ios_26_and_now_i_cant_connect_to/ Given the direct impact on user experience and services relying on web-based authentication, we would appreciate any information on whether this behavior is being investigated or if there are any technical recommendations to mitigate the issue. Thank you for your attention.

"Our app has absolutely no integration with DiDi login. We only integrate WeChat, QQ, carrier, and Apple ID login, and all related login entry icons are local resources. On an iPhone 16 Pro Max device with iOS system version 18.7, there was one isolated incident where the Apple ID login entry icon mysteriously changed to the DiDi app icon. What could be the possible iOS system-level causes for this?"

Is anyone else seeing 403 errors for PCC VRE when trying to pull assets for Release 41303? My pccvre audit of the Transparency Log passes (valid root digests for 41385), but the download fails consistently on specific CDN URLs: Failed to download SW release asset... response: 403 I’ve verified csrutil allow-research-guests is active and the license is accepted. Release 41385 seems fine, but 41303 is a brick wall. Is this a known pull-back or a CDN permissions sync issue?

I'm experiencing an issue with Sign In with Apple integration in my React Native Expo app (Bundle ID: com.anonymous.TuZjemyApp). Problem Description: When users attempt to sign in using Sign In with Apple, they successfully complete Face ID/password authentication, but then receive a "Sign-Up not completed" error message. The authentication flow appears to stop at this point and doesn't return the identity token to my app. Technical Details: Frontend Implementation: Using expo-apple-authentication. Requesting scopes: FULL_NAME and EMAIL App is properly configured in app.json with: usesAppleSignIn: true Entitlement: com.apple.developer.applesignin Backend Implementation: Endpoint: POST /api/auth/apple Using apple-signin-auth package for token verification Verifying tokens with audience: com.anonymous.TuZjemyApp Backend creates/updates user accounts based on Apple ID Question: I'm not sure why the authentication flow stops with "Sign-Up not completed" after successful Face ID verification. The identity token never reaches my app. Could you please help me understand: What might cause this specific error message? Are there any additional Apple Developer Portal configurations required? Could this be related to app capabilities or entitlements? Is there a specific setup needed for the app to properly receive identity tokens? I set up provisioning profiles, and added Sign in with Apple as a capability and still it doesn't work.