http://www.washingtonpost.com/blogs/the-switch/wp/2017/09/27/apple-is-opening-up-amid-privacy-questions-about-face-id-personal-data-collection/

Apple released more details about the iPhone X's Facial ID feature when it published a new privacy site Wednesday, addressing some of the concerns that people have had since the face-scanning feature was announced.

When Apple unveiled the feature, which can unlock phones and be used for payments, it spurred not only a thousand alarming think pieces, but also a letter from Sen. Al Franken (D-Minn.) asking how the company will protect the data. There have also been worries about how much to trust Face ID.  The company's first public demo of Face ID didn't go that smoothly, after all — at one point, the demonstrator had to skip the face scan and enter his password instead.