In their first U.S. court appearances, two Israeli men pleaded not guilty on Thursday to charges that they broke into a dozen companies’ computer networks, including J.P. Morgan Chase & Co., to facilitate a global network of criminal activity, reports The Wall Street Journal and Bloomberg News.

Gery Shalon and Ziv Orenstein have been in custody in Israel since their arrest last summer. They were extradited to the United States to face the charges.

“Federal prosecutors accused the three men and their accomplices of carrying out data breaches at a dozen companies and turning the stolen information, including customers’ email addresses and phone numbers, into hundreds of millions of dollars,” reports Nicole Hong for The Journal. “The hacking allegedly facilitated a host of other crimes, including illegal internet casinos, pump-and-dump schemes, a payment processing service for other criminals and an unlicensed bitcoin exchange.”

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According to Grant Gross from IDG News Service, the banking document record leak now are known as the Panama Papers included 11.5 million confidential documents dating from the 1970s through to late 2015 — 4.8 million emails, 3 million database format files, 2.2. Million PDFs, 1.1 million images and 320,000 text documents. All of these documents were from Panama Law Firm Mossack Fonseca.

Allegedly these leaked documents reveal how dozens of high-profile professionals including public officials in countries including the U.K., France, and China have hidden their wealth abroad to avoid paying taxes, ContractRoom reports on its website.

What is clear is that if indeed these files were hacked from emails or off the server of Mossack Fonseca, this firm was not using a Cloud platform with proper security and encryption to store their documents. It appears they were using an on-site server.

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