25 December 2011 Last updated at 19:14 ET
The activist hacker group Anonymous says it has stolen thousands of emails, passwords and credit card details from a US-based security think-tank.
The hackers claim they were able to obtain the information because the company, Stratfor, did not encrypt it.
They say Stratfor's clients include the US defence department, law enforcement agencies and media organisations.
The Austin-based company says it has now suspended the operation on its servers and email.
BBC News - 'Anonymous' hackers hit US security firm Stratfor