A letter from Google to lawmakers revealed that third-party app developers can access Gmail users' messages for ad targeting purposes -- as well as share the data with partners.
Verizon-owned Oath is pitching a service to advertisers analyzing AOL and Yahoo emails to provide targeted ad data, according to The Wall Street Journal.
The outside app companies receive access to messages from Gmail users who signed up for things like price-comparison services or automated travel-itinerary planners.
Cook has made much of Apple's 'respectful' approach to personal information since the Cambridge Analytica scandal and has said Facebook is 'beyond' regulation.
Ahead of World Password Day, a recent PCMag survey of 1,000 U.S. consumers found that many people are still terrible at creating and securing their passwords.
Meanwhile, the British Parliament has threatened to issue a summons to Facebook CEO Mark Zuckerberg to testify across the pond if he doesn't voluntarily agree to do so.