Yahoo has been struggling for years to keep people coming back to its digital services such as email. That challenge just got more daunting after hackers stole sensitive information from at least 500 million accounts.

The startling breach disclosed Thursday is believed to be the largest to hit a single email provider. The security breakdown risks magnifying Yahoo's preexisting problems — specifically, that it is losing users, traffic and the advertising revenue that follows both, to rivals such as Google and Facebook.

South Korea's government asked Samsung Electronics to extend the refund period for its Galaxy Note 7 smartphones that have been subject to an unprecedented global recall.

The Korean Agency for Technology and Standards, the government agency responsible for product safety and recalls, has not approved Samsung's smartphone recall plan because its measures on how to remove Note 7s already in the market were inadequate, Nam Taek-joo, the agency official, said by phone Thursday.

U.S. internet giant Google launched Wednesday a smart messaging app aimed at muscling into a busy market with popular rivals such as WhatsApp and Facebook's messenger.

Allo's "smart" capabilities aims to make it easier to respond to messages and over time adjusts to users' own style, Google said in an official blog.

The suicide of a woman who battled for months to have a video of her having sex removed from the internet is fueling debate in Italy on the "right to be forgotten" online.

Game geeks with a heart for digital romance have something to celebrate as sensual, soft-spoken cyber women are blurring the line between reality and fantasy at the Tokyo Game Show.

Uber launched a groundbreaking driverless car service Wednesday, jumping ahead of Detroit auto giants and Silicon Valley rivals with technology that could revolutionize transportation. 

Samsung said Wednesday it would limit recharging of the batteries of its Galaxy Note 7 smartphones to lower the risk of explosions in a measure apparently intended to jolt users into returning their devices following a recall.

The South Korean electronics giant on September 2 suspended sales of its latest flagship smartphone and announced a recall of 2.5 million units already sold, after faulty batteries caused some handsets to explode during charging.

Apple may not become an automaker, but it still wants to develop its own self-driving technology.

The iPhone-maker's automotive project, long an open secret in Silicon Valley, is shifting to focus on creating the technology for an autonomous vehicle that doesn't require a human driver. The new direction apparently doesn't foreclose the possibility that Apple might someday build its own car, but it opens the door to partnering with other car companies.

The U.S. Federal Aviation Administration strongly urged passengers Thursday not to turn on or charge Samsung Galaxy Note 7 smartphones on aircraft following recent reports of explosions from faulty batteries.

The South Korean smartphone maker last week suspended sales of the "phablet" and recalled 2.5 million units following the reports.

America's intelligence chief on Wednesday said Russia hacks U.S. computer networks "all the time," while also seeking to reassure the public the transition to a new president would "be OK."

U.S. agencies, companies and individuals are frequently targeted by overseas hackers, and Democratic presidential nominee Hillary Clinton's campaign has accused Moscow of hacking into Democratic National Committee (DNC) emails.