Yahoo has admitted that it was hit with the world's largest ever cyber attack involving a breach of customer data. The historic hack, which occurred in 2013, could have resulted in the company losing the personal details and passwords of one billion accounts, it admitted.
Here's everything you need to know about the latest and most extensive attack.
Yahoo received a bundle of data back in November that they were told had been taken in a hack. External computer forensics experts analysed the information and this week confirmed that it is likely to be customer data associated with one billion accounts that was stolen in August 2013.
The information taken could have included names, email addresses, telephone numbers, dates of birth and hashed passwords, which are scrambled and harder to read than plain text ones. In some cases security questions and answers were also taken, a number of which were unencrypted meaning they can be easily read. The stolen information didn't include payment or bank account details, which are stored in a separate system.
Am I at risk?
Given that there are only around 3 billion users on the internet, the hack affects a significant number of people (although it should be noted the attack affected 1 billion accounts not people). If you set up an account with Yahoo, which has 850 million active monthly users, before August 2013 then you could have had information stolen in the breach.
Although no financial information was taken, account holders could now be at risk of being targeted by fraudsters looking for financial details or more identifying information. If stolen password and email combinations are re-used on other websites, hackers could used them to log into other websites, while email addresses may be targeted with phishing attacks.
REad more here: http://www.telegraph.co.uk/technology/2016/12/15/yahoo-hack-need-know-biggest-data-breach-history/