Prioritize user privacy and data security in your app. Discuss best practices for data handling, user consent, and security measures to protect user information.

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Security Resources
General: Forums topic: Privacy & Security Apple Platform Security support document Developer > Security Enabling enhanced security for your app documentation article Creating enhanced security helper extensions documentation article Security Audit Thoughts forums post Cryptography: Forums tags: Security, Apple CryptoKit Security framework documentation Apple CryptoKit framework documentation Common Crypto man pages — For the full list of pages, run: % man -k 3cc For more information about man pages, see Reading UNIX Manual Pages. On Cryptographic Key Formats forums post SecItem attributes for keys forums post CryptoCompatibility sample code Keychain: Forums tags: Security Security > Keychain Items documentation TN3137 On Mac keychain APIs and implementations SecItem Fundamentals forums post SecItem Pitfalls and Best Practices forums post Investigating hard-to-reproduce keychain problems forums post App ID Prefix Change and Keychain Access forums post Smart cards and other secure tokens: Forums tag: CryptoTokenKit CryptoTokenKit framework documentation Mac-specific resources: Forums tags: Security Foundation, Security Interface Security Foundation framework documentation Security Interface framework documentation BSD Privilege Escalation on macOS Related: Networking Resources — This covers high-level network security, including HTTPS and TLS. Network Extension Resources — This covers low-level network security, including VPN and content filters. Code Signing Resources Notarisation Resources Trusted Execution Resources — This includes Gatekeeper. App Sandbox Resources Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com"
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3.5k
Nov ’25
Privacy & Security Resources
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"
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311
Jul ’25
Ask for help on Guideline 1.1.6-Safety-Objectionable Content
Our company developed an app that relies on the collected list to display the phone's label in the list when the user's phone receives an incoming call. However, we have been rejected. The main reason for the rejection is as follows: “ Guideline 1.1.6 - Safety - Objectionable Content The app still allows users to unblock and reveal blocked incoming numbers to identify the individual calling or texting, which is not appropriate. Specifically, your app claims to offer the call blocking functionality, but solely identifies numbers that the user has explicitly blocked themselves. Since users can choose to hide their caller ID in iPhone Settings, apps should not attempt to circumvent this iOS feature to reveal the caller's number. ” But our developers clearly stated that there is no way to bypass these settings, and CallDirectory Extensionde cannot directly "unlock hidden numbers" or bypass the built-in restrictions of IOS. We don't know how to solve this problem next, and hope to get everyone's help.
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413
Jan ’25
Is there anyway to deny user copy file content
I'm developing a file access control system. In order to protect the file content copied out, I'm finding a way to deny user copy file content to other files. I know there are data transmission between the copied application and pboard service by XPC. But I don't know how to interrupt the data transmission. Or I can do something to stop the copied data send to the Clipboard. So is there any way to prevent the contents of a file being copied?
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505
Dec ’24
Fraud prevention using Device Check when publishing multiple apps
I would like to confirm about fraud prevention using Device Check when publishing multiple apps. If the Team ID and Key ID are the same, will the values be shared across all apps with Device Check? With Device Check, only two keys can be created per developer account, and these two are primarily intended for key renewal in case of a leak, rather than for assigning different keys to each app, correct? If both 1 and 2 are correct, does that mean that Device Check should not be used to manage "one-time-only rewards per device" when offering them across multiple apps? Thank you very much for your confirmation.
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170
Apr ’25
Anti-**** Apps Need Solutions to iOS Sandbox Restrictions
Hello everyone, I’ve been working on ways to implement stricter accountability systems for personal use, especially to prevent access to NSFW content in apps like Reddit and Twitter. The main challenge is that iOS sandboxing and privacy policies block apps from monitoring or interacting with other apps on the system. While Apple’s focus on privacy is important, there’s a clear need for an opt-in exception for accountability tools. These tools could be allowed enhanced permissions under stricter oversight to help users maintain accountability and integrity without compromising safety. Here are a few ideas I’ve been thinking about: 1. Vetted Apps with Enhanced Permissions: Allow trusted applications to bypass sandbox restrictions with user consent and close monitoring by Apple. 2. Improved Parental Controls: Add options to send notifications to moderators (like accountability partners) when restrictions are bypassed or disabled. 3. Custom Keyboard or API Access: Provide a framework for limited system-wide text monitoring for specific use cases, again with user consent. If anyone has ideas for how to address this within current policies—or suggestions for advocating for more flexibility—I’d appreciate the input. I’m curious how others have handled similar challenges or if there are better approaches I haven’t considered.
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501
Jan ’25
Appstore submission rejected - Privacy
Please correct the following issues and upload a new binary to App Store Connect. ITMS-91061: Missing privacy manifest - Your app includes “Frameworks/FirebaseCoreDiagnostics.framework/FirebaseCoreDiagnostics”, which includes FirebaseCoreDiagnostics, an SDK that was identified in the documentation as a commonly used third-party SDK. If a new app includes a commonly used third-party SDK, or an app update adds a new commonly used third-party SDK, the SDK must include a privacy manifest file. Please contact the provider of the SDK that includes this file to get an updated SDK version with a privacy manifest. For more details about this policy, including a list of SDKs that are required to include signatures and manifests, visit: https://developer.apple.com/support/third-party-SDK-requirements. ITMS-91061: Missing privacy manifest - Your app includes “Frameworks/FBLPromises.framework/FBLPromises”, which includes FBLPromises, an SDK that was identified in the documentation as a commonly used third-party SDK. If a new app includes a commonly used third-party SDK, or an app update adds a new commonly used third-party SDK, the SDK must include a privacy manifest file. Please contact the provider of the SDK that includes this file to get an updated SDK version with a privacy manifest. For more details about this policy, including a list of SDKs that are required to include signatures and manifests, visit: https://developer.apple.com/support/third-party-SDK-requirements. ITMS-91061: Missing privacy manifest - Your app includes “Frameworks/GoogleDataTransport.framework/GoogleDataTransport”, which includes GoogleDataTransport, an SDK that was identified in the documentation as a commonly used third-party SDK. If a new app includes a commonly used third-party SDK, or an app update adds a new commonly used third-party SDK, the SDK must include a privacy manifest file. Please contact the provider of the SDK that includes this file to get an updated SDK version with a privacy manifest. For more details about this policy, including a list of SDKs that are required to include signatures and manifests, visit: https://developer.apple.com/support/third-party-SDK-requirements. our app is .NET MAUI app so we already addressed this by adding privacyinfo.xcprivacy privacy manifest under platform/ios/resources but still get flagged for this <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>NSPrivacyTracking</key> <false/> <key>NSPrivacyTrackingDomains</key> <array/> <key>NSPrivacyAccessedAPITypes</key> <array> <dict> <key>NSPrivacyAccessedAPIType</key> <string>NSPrivacyAccessedAPICategoryFileTimestamp</string> <key>NSPrivacyAccessedAPITypeReasons</key> <array> <string>C617.1</string> </array> </dict> <dict> <key>NSPrivacyAccessedAPIType</key> <string>NSPrivacyAccessedAPICategorySystemBootTime</string> <key>NSPrivacyAccessedAPITypeReasons</key> <array> <string>35F9.1</string> </array> </dict> <dict> <key>NSPrivacyAccessedAPIType</key> <string>NSPrivacyAccessedAPICategoryDiskSpace</string> <key>NSPrivacyAccessedAPITypeReasons</key> <array> <string>E174.1</string> </array> </dict> <dict> <key>NSPrivacyAccessedAPIType</key> <string>NSPrivacyAccessedAPICategoryUserDefaults</string> <key>NSPrivacyAccessedAPITypeReasons</key> <array> <string>CA92.1</string> </array> </dict> </array> <key>NSPrivacyCollectedDataTypes</key> <array/> </dict> </plist>
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Apr ’25
DeviceCheck - Device Validation Endpoint not working
We have been having very high response times in device check device validation service (https://developer.apple.com/documentation/devicecheck/accessing-and-modifying-per-device-data#Create-the-payload-for-a-device-validation-request) since 17 July at 19:10hs GMT. The service information page says the service was running in green status but that isn't the case and we currenly have stop consuming it. Is it being looked at? Are you aware of this issue? Can you give us an estimate of when it should be working correctly?
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759
Jul ’25
Migrating SiwA users after app transfer
We recently transferred our app from one developer account to a new one, internally. We're trying to transfer our sign in with apple users, but have hit a snag on the first step. I'm following the instructions here to "Obtain the user access token": https://developer.apple.com/documentation/sign_in_with_apple/transferring_your_apps_and_users_to_another_team This is my request as created in postman: curl --location 'https://appleid.apple.com/auth/token/' --form 'grant_type="client_credentials"' --form 'scope="user.migration"' --form 'client_id="com.XXXXX"' --form 'client_secret="XXXXX"' No matter what I try, I always receive invalid_client. I've uploaded example JWTs in FB15648650.
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451
Dec ’24
SmartCard Pairing with PIN for user and prompted for a Password authentication for keychain access app
During SmartCard pairing the PIN prompt enables the OK button only on user provides a PIN of 6 digits. Is there a way to submit the empty PIN in this flow, where the custom CTK is used here (the custom CTK would take care of the PIN from the custom ctk code). I was able to do an empty PIN submit once the I've paired the user successfully at login, unlock and other cli tools. Is there a way to do the same during the pairing? Once the user has successfully paired with the SmartCard authentication with PIN, I was able to see most of the authentication flows was prompting for the PIN authentication like login, unlock, CLI tools like ssh, su etc., perhaps at few apps where it is still prompted with the Password instead of PIN examples, when I tried to launch Keychain Access app or Add a user from users&amp;groups system setting. Is this expected behaviour?
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354
Feb ’25
Intermittent Failures Launching App from Universal Links using ASWebAuthenticationSession
I'm developing an iOS app that utilizes Universal Links and ASWebAuthenticationSession to deep-link from a website to the app itself. This implementation adheres to the recommendations outlined in RFC 8252, ensuring that the app opening the ASWebAuthenticationSession is the same app that is launched via the Universal Link. Problem:  While most users can successfully launch the app via Universal Links,a few percent of users experience instances where the app fails to launch, and the user is redirected to the browser. What I've Tried:  ASWebAuthenticationSession Configuration: I've double-checked the configuration of callbackURLScheme and presentationContextProvider.  Universal Links: Verified the apple-app-site-association file and associated domains entitlement.  Network Conditions: Tested on various network environments (Wi-Fi, cellular) and devices. Questions:  What are the potential causes for this behavior?  Has anyone else encountered a similar issue and found a solution?  Are there any debugging techniques or ways to generate more detailed logs? I haven't been able to determine which device or OS version is causing this problem. Thank you.
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1.1k
Apr ’25
accessing Items.data
Hi Guys, I want to access items.data file from this location **/Library/Caches/com.apple.findmy.fmipcore/Items.data ** Can anyone hlep me how to decrypt this file as this is encrypted now. Any help on this is highly appreciated. I want to access my own airtag data and this is the only way i believe. Thanks in advance.
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Jan ’25
Privacy Resources
General: Forums topic: Privacy & Security Forums tag: Privacy Developer > Security — This also covers privacy topics. App privacy details on the App Store UIKit > Protecting the User’s Privacy documentation Bundle Resources > Privacy manifest files documentation TN3181 Debugging an invalid privacy manifest technote TN3182 Adding privacy tracking keys to your privacy manifest technote TN3183 Adding required reason API entries to your privacy manifest technote TN3184 Adding data collection details to your privacy manifest technote TN3179 Understanding local network privacy technote Handling ITMS-91061: Missing privacy manifest forums post Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com"
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137
Jul ’25
Using Device Data for Finger Printing
Our business model is to identify Frauds using our advanced AI/ML model. However, in order to do so we need to collect many device information which seems to be ok according to https://developer.apple.com/app-store/user-privacy-and-data-use/ But it's also prohibited to generate a fingerprint, so I need more clarification here. Does it mean I can only use the data to identify that a user if either fraud or not but I cannot generate a fingerprint to identify the device? If so, I can see many SKD in the market that generates Fingerprints like https://fingerprint.com/blog/local-device-fingerprint-ios/ and https://shield.com/?
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438
Mar ’25
Outlook for Mac add-in - Passkeys
hello, My organization has an outlook add-in that requires auth into our platform. As Microsoft forces Auth on MacOS to use WKWebView https://learn.microsoft.com/en-us/office/dev/add-ins/concepts/browsers-used-by-office-web-add-ins, we are running into a situation that we cannot use passkeys as an auth method as we are unable to trigger WebAuthN flows. We’ve raised this in Microsoft side but they have deferred to Apple given WKWebView is Safari based. This is a big blocker for us to achieve a full passwordless future. Has anyone come across this situation? Thank you.
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316
Aug ’25
appleid.apple.com response servers IPs
Developers of our e-shop are preparing to enable Apple Sign In for account login. Apple ID verification is conducted via the domain appleid.apple.com, and the responses should be coming back from the following two Apple IP addresses: IPv4 Address: 17.32.194.6 IPv4 Address: 17.32.194.37 Question is whether these addresses are correct and if they remain unchanged over time. Alternatively, it is existing an official list of IP addresses that may be used for Apple Sign In verification response? This is necessary to ensure precise network communication settings and protection by F5 security solution. Thanks a lot for answers.
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150
Mar ’25