What was the Yahoo email-scanning tool, really?
Reporting on the Yahoo surveillance scandal raises more questions than answers.
U.S. scanning of Yahoo emails 'would be illegal,' NSA chief says
The details on Yahoo's reported scanning of users' emails remain murky.
Yahoo searched all users' emails for U.S. intelligence: report
The surveillance effort was first discovered last May.
Senators call Yahoo's delayed disclosure of 2014 hack 'unacceptable'
The Democratic lawmakers say they were 'disturbed' by the breach announcement.
After massive Yahoo hack, a new way to think about security questions
Treat your security questions like a riddle only you can decipher.