Security Researchers Develop Framework for Tracking Bluetooth Devices Using Find My

Ahead of the debut of AirTags and support for locating third-party Bluetooth items through Find My in iOS 14.5, a team of security researchers from the Secure Mobile Networking Lab at the Technical University of Darmstadt in Germany has reverse engineered the ‌Find My‌ protocol and developed an app that's designed to let anyone create an "AirTag" based on a Bluetooth-capable device.

openhaystack mac app
Called OpenHaystack, the app and the source code are available on GitHub for those who are interested in taking a look. The app allows users to create their own Bluetooth tags based on the ‌Find My‌ network by installing an "‌AirTag‌" firmware image on a Bluetooth dongle.

The app displays the most recent location of a created Bluetooth tag reported by any iPhone using Apple's ‌Find My‌ network that was implemented in iOS 13, plus it shows the location of the tag on a map.

According to the security researchers, the created tags send out Bluetooth beacons, which are picked up by nearby iPhones that interpret the sending device as lost. The current geolocation is end-to-end encrypted and then uploaded to Apple, with the OpenHaystack app then downloading the encrypted report from Apple and decrypting it locally on the Mac.

In the process of developing this tool, the Secure Mobile Networking Lab researchers also identified a macOS Catalina ‌Find My‌ vulnerability that was reported to Apple and addressed in a 10.15.7 update released back in November. The vulnerability allowed a malicious app to access iCloud decryption keys to download and decrypt location reports submitted by the ‌Find My‌ network.

Apple's iOS 14.5 update includes support for tracking third-party Bluetooth devices in the ‌Find My‌ app using a new "Items" tab, which takes advantage of the same ‌Find My‌ protocol used for the Mac app.

At the current time, in-app tracking is limited to Beats headphones and upcoming Belkin wireless earbuds, but in the future, many third-party Bluetooth devices may include ‌Find My‌ integration, making it easier to keep track of them. This system will also be used by Apple's own rumored AirTags, which have yet to be released.

Popular Stories

Apple Logo Top Half

Early iOS 26 Software Leak Uncovers Dozens of Upcoming Apple Features

Monday December 15, 2025 3:05 pm PST by
Software from an iPhone prototype running an early build of iOS 26 leaked last week, giving us a glimpse at future Apple devices and iOS features. We recapped device codenames in our prior article, and now we have a list of some of the most notable feature flags that were found in the software code. In some cases, it's obvious what the feature flags are referring to, while some are more...
iPhone Top Left Hole Punch Face ID Feature Purple

iPhone 18 Pro Features Leaked in New Report, Including Under-Screen Face ID

Tuesday December 16, 2025 8:44 am PST by
Next year's iPhone 18 Pro and iPhone 18 Pro Max will be equipped with under-screen Face ID, and the front camera will be moved to the top-left corner of the screen, according to a new report from The Information's Wayne Ma and Qianer Liu. As a result of these changes, the report said the iPhone 18 Pro models will not have a pill-shaped Dynamic Island cutout at the top of the screen....
apple beta 26 lineup

Apple Leak Confirms Work on Foldable iPhone, AirTag 2, and Dozens More Devices

Monday December 15, 2025 2:05 pm PST by
Last week, details about unreleased Apple devices and future iOS features were shared by Macworld. This week, we learned where the information came from, plus we have more findings from the leak. As it turns out, an Apple prototype device running an early build of iOS 26 was sold, and the person who bought it shared the software. The OS has a version number of 23A5234w, and the first...
iOS 26

iOS 26.3 Beta 1 Features: What's New So Far

Monday December 15, 2025 4:23 pm PST by
Apple is testing iOS 26.3, the next version of iOS 26 that will launch around January. Since iOS 26.3's testing is happening over the holidays, it is a smaller update with fewer features than we've seen in prior betas. We've rounded up what's new so far, and we'll add to our list with subsequent betas if we come across any other features. Transfer to Android Apple is making it simpler...
Apple Foldable Thumb

Leak Reveals Foldable iPhone Details

Monday December 15, 2025 9:09 am PST by
The first foldable iPhone will feature a series of design and hardware firsts for Apple, according to details shared by the Weibo leaker known as Digital Chat Station. According to a new post, via machine translation, Apple is developing what the leaker describes as a "wide foldable" device, a term used to refer to a horizontally oriented, book-style foldable with a large internal display....
iOS 26

iOS 26.4 and iOS 27 Features Revealed in New Leak

Friday December 12, 2025 10:56 am PST by
Macworld's Filipe Espósito today revealed a handful of features that Apple is allegedly planning for iOS 26.4, iOS 27, and even iOS 28. The report said the features are referenced within the code for a leaked internal build of iOS 26 that is not meant to be seen by the public. However, it appears that Espósito and/or his sources managed to gain access to it, providing us with a sneak peek...
apple iphone air battery pack

Apple Aims to Boost Popularity of iPhone Air 2 in Two Ways

Tuesday December 16, 2025 11:06 am PST by
We have been covering iPhone 18 Pro, iPhone 17e, and iPhone Fold details from The Information's report about future iPhone models, and next up is the iPhone Air 2. The report says that Apple aims to make the iPhone Air 2 more attractive in two ways. First, Apple is apparently considering adding a second rear camera to the device, which would resolve a key limitation. The current iPhone...
apple music chatgpt

ChatGPT's Apple Music Integration Is Now Live

Wednesday December 17, 2025 3:50 pm PST by
There's now a dedicated Apple Music app for ChatGPT, which allows ChatGPT to make music recommendations and build playlists. Apple Music can be added to ChatGPT through the Settings section in the Mac app, website, or iOS app. Apple Music is listed under the apps option, and connecting to it requires signing in with your Apple Account for authorization purposes. ChatGPT can be used to...
maxresdefault

Apple Developing iMac Pro With M5 Max Chip

Tuesday December 16, 2025 7:30 am PST by
Apple is developing a high-end iMac featuring the M5 Max chip, according to information from leaked internal software. Subscribe to the MacRumors YouTube channel for more videos. The finding comes from leaked kernel debug kit files used by Apple engineers. These kernel debug kit files enumerate unreleased Apple hardware by internal identifiers, such as codenames and platform names, and they...

Top Rated Comments

Apple_Robert Avatar
63 months ago

This is good stuff guys! Apple is on top of it
Apple is on top of it? What does that mean?
Score: 7 Votes (Like | Disagree)
coolfactor Avatar
63 months ago
This strikes me as concerning.
Score: 6 Votes (Like | Disagree)
Corsig Avatar
63 months ago
Yeah that won’t last long
Score: 5 Votes (Like | Disagree)
Apple_Robert Avatar
63 months ago

The privacy.. security...
The article is about a couple of researchers creating an app that reverse engineers Find My. This isn't awesome stuff. This is concerning.

Edited to correct my misunderstanding.
Score: 5 Votes (Like | Disagree)
cmaier Avatar
63 months ago

Awesome! Let’s hope Apple don’t try to patch this.
Why not? Security holes are bad. Anyone who wants to integrate into the Find My network can do so the official way.
Score: 5 Votes (Like | Disagree)
Apple_Robert Avatar
63 months ago

Awesome! Let’s hope Apple don’t try to patch this.
I hope Apple does patch the vulnerability and render this app useless.
Score: 4 Votes (Like | Disagree)