The company announced a major initiative to give its e-mail users more privacy options at the Black Hat USA conference.
Will Yahoo continue its acquisition spree with its Alibaba cash?
Yahoo beats expectations as it focuses on mobile, original content
Yahoo is playing catch up after years of being criticized for lagging behind the competition on privacy and security.
But shifting scopes are the norm for cybersecurity investigations.
Hundreds of thousands of users got hit by malware. But if Americans and Mac users weren't affected.
Someone hijacked Yahoo's ad servers to infect users' computers with malicious software.
Yahoo says the outage affected 1 percent of users -- or roughly 1 million people.
Implementing the same features doesn't mean attracting the same community.
Customers, and advertisers, are increasingly turning to digital video.