SHANGHAI (Reuters) – A hacker claims to have stolen the personal data of a billion Chinese citizens held by the Shanghai police in what could be one of the biggest data breaches in history if confirmed. This anonymous internet user behind the pseudonym ChinaDan posted on the Breach Forum last week an offer to sell more than 23 terabytes (TB) of data for ten bitcoins, or just under 200,000 euros. “In 2022, the database of the Shanghai National Police was leaked,” the report said. “The database contains information on one billion people in China and several billion items, including name,…