Apple's Core ML Could Surface Your iOS Secrets

Of the many new features in Apple's iOS 11--which hit your iPhone a few weeks ago--a tool called Core ML stands out. It gives developers an easy way to implement pre-trained machine learning algorithms, so apps can instantly tailor their offerings to a specific person's preferences. With this advance comes a lot of personal data crunching, though, and some security researchers worry that Core ML could cough up more information than you might expect--to apps that you'd rather not have it. Core ML boosts tasks like image and facial recognition, natural language processing, and object detection, and supports a lot of buzzy machine learning tools like neural networks and decision trees. And as with all iOS apps, those using Core ML ask user permission to access data streams like your microphone or calendar.