Are images uploaded to facebook though? Or are the face features extracted on the device? It&#x27;s one thing to upload every picture in full to FB, but it&#x27;s another to upload only a feature vector to Facebook.<p>What if the entire recognition pipeline happened completely on the device without any data being sent to Facebook?<p>Even if you have 1,000 friends, it might not a huuge deal to download a gallery of 1,000 models to compare to.<p>Of course, we can&#x27;t be sure how this system works without the source.