Tax Haven Data Leak Names Names, Raises Questions It's a data leak involving tens of thousands of offshore bank accounts, naming dozens of prominent figures around the world. And new details are being released by the day - raising the prospect that accounts based on promises of secrecy and tax shelter could someday offer neither. Among those named include a top campaign official in France, the ex-wife of pardoned oil trader Marc Rich, Azerbaijan's ruling family, the daughter of Imelda Marcos and the late Baron Elie de Rothschild. The widespread use of offshore accounts among the wealthy is widely known - even Mitt Romney acknowledged stashing some of his millions in investments in the Cayman Islands. But this week's leak, orchestrated by a Washington, D.C.-based group called the International Consortium of Investigative Journalists, appeared to be the broadest in what has been a steady stream of information emerging about hidden money in recent years amid a wave of anger targeting the super-rich in an age of austerity. The leak allegedly involved records from 10 tax havens, where the world's wealthy have long stashed funds. It uncovered a shadow network of empty holding companies and names essentially rented out to fill out boards of non-existent corporations, including a British couple listed as active in more than 2,000 entities, according to The Guardian newspaper, which participated in the global undertaking. 28, 2012 file photo, France's Finance Minister Pierre Moscovici, left, and then Budget Minister Jerome Cahuzac attend a press conference in Paris. Francois Hollande is a President on the ropes, reeling from a potentially knockout blow delivered by his ex-budget minister, a man who admitted this week that he had hidden hundreds of thousands of euros from the taxman for decades and lied about it. Those lies from Jerome Cahuzac came both in front of the National Assembly and to Hollande's own face. (AP Photo/Christophe Ena, File) Close The project started with the receipt of a hard drive by an Australian journalist, Gerard Ryle, who took the data with him when he joined the consortium, according to the project's website. The group, a project of the Washington-based Center for Public Integrity, has said the hard drive arrived in the mail, but did not specify its possible source or how it was authenticated. The consortium did not immediately respond to an emailed request for comment. Rudolf Elmer, who once ran the Caribbean operations of the Swiss bank Julius Baer and turned whistleblower after he was dismissed in 2002, told The Associated Press that he considers the data to be authentic. "This comprehensive information is like a torch that will probably set off a wildfire and bring to light a lot more about secretive tax havens," he said. The secret bank accounts of the rich and powerful have recently come under a crush of whistle-blowing scrutiny. France's former budget minister, Jerome Cahuzac, was forced to resign last month after a French investigative website unrelated to the latest leak revealed that he held offshore accounts - a particularly damaging scandal because he was spearheading a campaign against tax evasion. In 2010, a Greek journalist published a list of about 2,000 people holding undeclared Swiss bank accounts, disclosures that triggered a firestorm of outrage as Greeks were forced to swallow brutal austerity measures. In November, an HSBC insider leaked a list of more than 8,000 customers with accounts based in Britain's tiny Jersey Island, drawing an immediate tax investigation from Britain's revenue and customs service. Two years before that, a former HSBC employee stole account details for 24,000 clients. Germany, eager to learn about its own tax cheats, promptly offered to buy the information.