Apple Ratchets Up Security Tool for iPhone Users Targeted by Sophisticated Spyware

Apple is preparing a feature meant to secure its products against some of the world’s most sophisticated spyware.

The tool, dubbed Lockdown Mode, is intended for the small number of users targeted by spyware favored by state-sponsored hackers. When used, it will limit the abilities of apps, websites and features for security purposes. On an iPhone, for example, it will block most message attachments, as well as incoming FaceTime calls from people the user hasn’t previously had a call with.