In August 2013, unknown stole information on more than a billion user accounts Yahoo, including passwords, and in some cases, the answers to security questions, said in a statement.
According to the information disclosed by the company, we are talking about data, information about the theft of which Yahoo received from law enforcement in November. After analyzing it, the company confirmed that this is indeed the data of Yahoo users: they contained names, mail addresses, phones, birthdates, MD5-hashes of passwords and in some cases encrypted and unencrypted secret questions with answers to them.
Whether the payment data of users was stolen, it is not known exactly, but the company believes that the leakage did not affect them. Yahoo does not explain whether the company knew about the incident with the theft of these accounts earlier – before the appeal of law enforcement agencies.
The FAQ on leak in detail told about the measures that are now being accepted at Yahoo to help protect customers. Anyone who, according to the company, is susceptible to the incident, was sent a letter with detailed instructions, additional information will be published on Yahoo sites. The service discards compromised passwords, secret issues – deactivates, but these data can be used by attackers and services of other companies that do not impose increased security measures.
In September, Yahoo already reported on the leak of 500 million passwords stolen in late 2014: then it was considered the biggest hacking in history. The company claims that according to preliminary data, two hacking – in 2013 and 2014 – are not connected.
Wired noted that in the fall of 2013, Yahoo had only 800 million active users, and although the top estimate of the whole company was compromised to 1.5 billion accounts, many of them are probably already inactive. There are about 3 billion Internet users in the world, Wired stressed.
This is the largest hacking of an Internet company in history.
After reporting a data leak of 500 million accounts, Yahoo allowed a review of the amount of the deal to sell its business to the largest US cellular operator Verizon. In July, it was 4.8 billion dollars.
According to the New York Post, after news of a record leak Verizon demanded a discount of $ 1 billion. Whether the information on the new incident affects the amount of the deal, it is not yet known: in its background, the company’s shares are falling , but not sharply.