While key details remained shrouded in secrecy, last week's disclosures about a clandestine government program for tracking Internet users has placed some of Silicon Valley's biggest tech companies in an uncomfortable spotlight.
Apple, Facebook, Google and Yahoo have all denied initial reports that they gave the government wholesale access to their servers. But U.S. officials confirmed the existence of a program focused on accessing the online activity of people outside the United States, as authorized by a secretive national security court, and critics said the program could easily pull in information about U.S. users as well.
Experts warn that the government program known as Prism will make it more difficult for the companies to maintain consumer trust and expand their business both here and overseas, in an industry that depends on consumers' willingness to share intimate details of their lives online — via e-mails, photos, Internet voice calls or even the websites they visit.
"These companies are trying to expand in markets around the world. Whatever assurances the government is giving to U.S. citizens, imagine if you were living in Brazil or India. I don't see how this isn't going to hurt," said Irina Raicu, who runs the Internet program at Santa Clara University's Markkula Center for Applied Ethics.
The disclosures are likely to make U.S. consumers more wary as well, experts said. Internet users generally expect that the companies to which they are entrusting their data will use or exploit it in some commercial way, said David Aaker, vice chairman of Prophet, a San Francisco marketing firm. But he added that giving that data to a third party, such as the government, is "frightening" to many people.
Industry leaders also worry the program could undercut the positions that Google and other companies have taken in resisting demands for information by autocratic regimes around the world, according to one executive who insisted on anonymity because he wasn't authorized to speak on the subject.
Other Internet executives expressed frustration, both with what they called distorted news coverage and with government secrecy requirements that they said made it difficult to discuss the issue.
"The level of secrecy around the current legal procedures undermines the freedoms we all cherish," Google CEO Larry Page said in a blog post co-signed by his company's chief legal officer, David Drummond.