One billion affected by Yahoo hack. Image copyright. Reuters. Yahoo has said more than one billion user accounts may have been affected in a hacking attack dating back to 2. The internet giant said it appeared separate from a 2. September, when Yahoo revealed 5. Yahoo said names, phone numbers, passwords and email addresses were stolen, but not bank and payment data. The company, which is being taken over by Verizon, said it was working closely with the police and authorities. Yahoo said it believes an unauthorised third party, in August 2. The breach is likely distinct from the incident the company disclosed on September 2. However, the three year old hack was uncovered as part of continuing investigations by authorities and security experts into the 2. Yahoo said. Account users were urged to change their passwords and security questions. The California based company has more than a billion monthly active users, although many people have multiple accounts. Hack Yahoo Mail FreeIf youve just logged into your Yahoo email and read an urgent security letter from the Yahoo team saying that your account has been compromised, you are. The news that the internet giant Yahoo had 1 billion accounts hacked in 2013 may have been on the front page, but Im guessing most users hardly raised an eyebrow. Step1. Run Yahoo password cracker. After running the Yahoo password hacker, go to the Password Key Finder on the top menu. Step2. Select Yahoo mail. Yahoo said a newly discovered data breach affected more than a billion users, dwarfing the scope of another recently disclosed hack and raising fresh questions. There are also many accounts that are little used or dormant. Vulnerability. Cyber security expert Troy Hunt told the BBC This would be far and away the largest data breach weve ever seen. In fact, the 5. 00 million they reported a few months ago would have been, and to see that number now double is unprecedented. Yahoo said some of the breach could be linked to state sponsored activity, as with the previous attack. Prof Peter Sommer, a specialist in digital forensics at Birmingham City University, told the BBC he could be persuaded it was a state sponsored hack, but at the moment Im not. What on earth is a state going to do with one billion accounts of ordinary users Thats the difficulty I have, he said. In September, when Yahoo disclosed the 2. Yahoo knew of state backed hack in 2. Verizon Yahoo data breach may hit deal. Hack Yahoo Account PasswordSenators demand answers over Yahoo hack. The latest disclosure raises fresh questions about Verizons 4. Yahoo, and whether the US mobile carrier will try to modify or abandon its bid. Pattern of serious failuresIf the hacks cause a user backlash against Yahoo, the companys services would not be as valuable to Verizon. Image copyright. Getty Images. Image caption. Yahoo chief executive Marissa Mayer is negotiating the sale of Yahoos core business to Verizon. Verizon said that it would evaluate the situation as Yahoo investigates and would review the new development before reaching any final conclusions. Mr Hunt said that Verizon allegedly cut its valuation of Yahoo by 1bn almost 2. Reconnect Dialogues. Cinema Die Hгјtte - Ein Wochenende Mit Gott. The latest revelations will surely impact that valuation even further, not just because of the scale of it, but because it shows a pattern of serious failures on Yahoos behalf, he said. One billion Yahoo accounts were stolen in 2013, the company announced on Wednesday, in the largest known hack of all time. The incident is separate from. It is a further embarrassment to a company that was once one of the biggest names of the internet but which has failed to keep up with rising stars such as Google and Facebook. Yahoo was once deemed to be worth 1. Various attempts to revive its fortunes have failed to stem its decline. Analysis Dave Lee, North America technology reporter. Good grief, can things get any worse for Yahoo A complete disaster. Embarrassing. NegligentWeve come to accept that even the best systems get attacked by cyber criminals. But repeatedly And in such great numbers Something was seriously, seriously wrong. Looking to the future, this is yet more concern for Verizon, which agreed to buy Yahoo before all of these disasters were made public. It wanted the company because of its huge user base and advertising reach. How many of those users are going to stick around when this kind of thing is going on Whats in it for them Theres talk of a discount on the 4. Verizon agreed to pay out. Its a game of how low can you go in the new year, youd think. At-Least-500-Million-Yahoo-Accounts-Hacked.jpg' alt='Hack Yahoo Email Account' title='Hack Yahoo Email Account' />Washington A 2013 hack affected all three billion accounts at Yahoo, triple the original estimate, the online giants parent company said Tuesday following a new. It was the biggest known breach of a companys computer network. And now, it is even bigger. Verizon Communications, which acquired Yahoo this year, said.