Yahoo data breach affects at least 500 million users

A massive breach at Yahoo compromised account details from at least 500 million users, and the company is blaming the attack on state-sponsored hackers.Names, email addresses, telephone numbers, and hashed passwords may have been stolen as part of the hack, which occurred in late 2014, Yahoo said.The company reported the breach on Thursday, after a stolen database from the company went on sale on the black market last month.However, the hacker behind the sale claimed that the stolen databas