![]() Nearby iPhones will not be able to distinguish our accessories from a genuine Apple device or certified accessory. In short, the accessories broadcast the public key as Bluetooth Low Energy (BLE) advertisements (see firmware). The private key remains on the Mac securely stored in the keychain, and the public key is deployed on the accessory, e.g., an attached micro:bit. To use Apple's Find My network, we generate a public-private key pair on an elliptic curve (P-224). We provide a schematic overview (from our paper) and explain how we integrate the different steps in OpenHaystack below. ![]() Please refer to our PETS paper and Apple's accessory specification for more details. We briefly explain Apple's offline finding system (aka Find My network). You can click on every item to check when the last update was received.īy clicking the reload button, you can update the location reports. The map will always show all your items' most recent locations. It can take up to 30 minutes until you will see the first location report on the map on the right side. Instead of using OpenHaystack's integrated deployment, you may also copy the public key used for advertising (right click on accessory) and deploy it manually. The private key is stored in your Mac's keychain.Ĭonnect a supported device via USB to your Mac and hit the Deploy button next to the accessory's name and choose the corresponding. The app then generates a new key pair that is used to encrypt and decrypt the location reports. To create a new accessory, you just need to enter a name for it and optionally select a suitable icon and a color. Open a terminal and enter sudo spctl -master-enable, which will enable Gatekeeper again.Run this command in terminal sudo defaults write "/Library/Preferences/" EnableBundles 1 and activate the checkbox next to OpenHaystackMail.mailbundle. Go to Preferences → General → Manage Plug-Ins. Open a terminal and run sudo spctl -master-disable, which will disable Gatekeeper and allow our Apple Mail plugin to run.This will ask you to install the Mail plugin in ~/Library/Mail/Bundle. Download a precompiled binary release from our GitHub page.Īlternative: build the application from source via Xcode.Our plugin does not access any other private data such as emails (see source code). Therefore, the installation procedure is slightly different and requires you to temporarily disable Gatekeeper. It is used to download location reports from Apple's servers via a private API (technical explanation: the plugin inherits Apple Mail's entitlements required to use this API). The OpenHaystack application requires a custom plugin for Apple Mail. OpenHaystack requires macOS 11 (Big Sur). Second, the firmware image enables Bluetooth devices to broadcast beacons that make them discoverable by iPhones. First, we provide a macOS application that can display the last reported location of your personal Bluetooth devices. OpenHaystack is not affiliated with or endorsed by Apple Inc. For example, OpenHaystack accessories using our firmware broadcast a fixed public key and, therefore, are trackable by other devices in proximity (this might change in a future release). Since its release, we received quite a bit of press and media coverage. The most severe one, which allowed a malicious application to access location data, has meanwhile been fixed by Apple ( CVE-2020-9986).įor more information about the security analysis, please read our paper. We disclosed a specification of the closed parts of offline finding and conducted a comprehensive security and privacy analysis. The whole system is a clever combination of Bluetooth advertisements, public-key cryptography, and a central database of encrypted location reports. We identified how Apple devices can be found by iPhones devices, even when they are offline through this work. We at the Secure Mobile Networking Lab of TU Darmstadt started analyzing offline finding after its initial announcement in June 2019. OpenHaystack is the result of reverse-engineering and security analysis work of Apple's Find My network (or offline finding). Nearby iPhones will discover your accessories and upload their location to Apple's servers when they have a network connection. All you need is a Mac and a BBC micro:bit or any other Bluetooth-capable device.īy using the app, you can track your accessories anywhere on earth without cellular coverage. OpenHaystack is an application that allows you to create your own accessories that are tracked by Apple's Find My network. ) or integrate it into other Bluetooth-capable devices such as notebooks. Use it to create your own tracking tags that you can append to physical objects (keyrings, backpacks. OpenHaystack is a framework for tracking personal Bluetooth devices via Apple's massive Find My network.
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