In what could be the biggest-ever data breach, sensitive personal information about more than a billion people has been leaked from a government agency, possibly from China, and put up for sale on Dark Web for 10 Bitcoins. Changpeng Zhao, CEO of cryptocurrency exchange Binance, tweeted that their threat intelligence detected 1 billion resident records for sale on the Dark Web. “It includes name, address, national ID, mobile, police and medical records from one Asian country. Likely due to a bug in an ElasticSearch deployment by a government agency,” Zhao claimed in his tweet. “This has an impact on hacker detection/prevention measures, mobile numbers used for account takeovers, etc. It is important for all platforms to enhance their security measures in this area,” he further posted. Binance has already stepped up verifications for users potentially affected, Zhao said. Media reports claimed that this leaked data may belong to Chinese citizens as a user on an underground hacking forum claimed to be selling a 23TB database for 10 Bitcoins of billions of Chinese citizens. The information may have been leaked from the Shanghai National Police (SHGA) database, although the Chinese government was yet to react to this.