Yahoo says investigating claim of new hack of user data

Yahoo! Inc. is investigating a new claim that user account data was obtained by a hacker, the latest security challenge for the company as it prepares for the planned acquisition of its core web services by Verizon Communications Inc. Law enforcement authorities on Monday began sharing certain information they indicated was provided by a hacker who claimed it was Yahoo user account data, the company said Wednesday in a regulatory filing. Yahoo said it’s analysing the matter with the help of forensic experts. Chief Executive Officer Marissa Mayer is trying to navigate questions about the security of the web portal’s products while preparing for Verizon to acquire the core internet operations. Yahoo said the $4.8 billion deal is still expected to close in the first quarter of next year. (Brian Womack/Bloomberg)