The database of one billion accounts was on offer for $200,000
The 2014 hacking of Yahoo's servers is the second largest
This massive cyber attack has affected 500 million Yahoo user
Investigating committee said key executives should have done more when issues were discovered
The company has incurred $16 million in direct costs so far related to the breaches, a report said
For potentially malicious activity on their accounts between 2015 and 2016
The year-ago quarter included a $4.46 bn write-down to account for the lower value of some units
Yahoo suffered all the classic weaknesses of large corporations
Yahoo has a deal to sell its core internet business, which includes its digital advertising, email and media assets, to Verizon for $4.83 billion
Verizon had already said in October it was reviewing the deal after September's breach disclosure
Yahoo is forcing some users to reset passwords after latest hack, but experts say that can cause people to drop a service
The number of affected accounts was double the number implicated in a 2014 breach that the internet company disclosed in September and blamed on hackers working on behalf of a government
Yahoo says users' names, email addresses, phone numbers, birthdays and security questions and answers may all have been accessed by the attackers, but that bank account and payment data should be safe.
Yahoo said it hasn't identified the intrusion associated with this theft
It's not immediately clear why, according to the company's 2016 diversity report
Yahoo had 8,800 employees at the end of the second quarter, down from 9,400 as at March 31
Results provided an initial indication that the data breach has not led to a quick exodus of Yahoo! customers
Details of Yahoo's cooperation with the court order come two weeks after the company reported that hackers had broken into its computer network
It is not known what information intelligence officials were looking for, only that they wanted Yahoo to search for a set of characters
Divyank Turakhia, founder and CEO of Media.net, said he expects many other firms to copy the strategy in future