"What we have... is... concrete proof of U.S.-based... companies participating with the NSA in wholesale surveillance on us, the rest of the world, the non-American, you and me," Mikko Hypponen, chief research officer at Finnish software security firm F-Secure.
German data commissioner calls monitoring "monstrous"
* European Commission says must enact new law speedily
* Security expert says solution is European dot.com industry
By Georgina Prodhan and Claire Davenport
VIENNA/BRUSSELS, June 7 (Reuters) - Europeans reacted angrily on Friday to revelations that U.S. authorities had tapped the servers of Internet companies for personal data, saying such activity confirmed their worst fears about American Web giants' reach and showed tighter regulations were needed.
The Washington Post and the Guardian newspapers aroused broad outrage with reports that the National Security Agency (NSA) and the FBI had accessed central servers of Google , Facebook and other big Internet companies and gathered millions of phone users' data.
Europe has long yearned to contain the power of the U.S. titans that dominate the Internet, and privacy-focused Germany was quick to condemn the companies' co-operation with the U.S. security services.
"The U.S. government must provide clarity regarding these monstrous allegations of total monitoring of various telecommunications and Internet services," said Peter Schaar, German data protection and freedom of information commissioner.
"Statements from the U.S. government that the monitoring was not aimed at U.S. citizens but only against persons outside the United States do not reassure me at all," he said.
The Washington Post said the secret program involving the Internet companies, code-named PRISM and established under President George W. Bush, had seen "exponential growth" during the past several years under Barack Obama.