You may have been suspecting that your email is being monitored. Now we have proof that it is. It is possible that, as this becomes more widely known, there will be an increased inpetus for everyone to encrypt their email and/or VoIP communications. . . .
Citing anonymous sources in the British intelligence community, The Sunday Times reported that an e-mail message intercepted by NSA spies precipitated a massive investigation by intelligence officials in several countries that culminated in the arrest of nine men in Britain and one in suburban Orleans, Ont. -- 24-year-old software developer Mohammed Momin Khawaja, who has since been charged with facilitating a terrorist act and being part of a terrorist group.

The Orleans arrest is considered an operational milestone for this vast electronic eavesdropping network and its operators. But Dave Farber, an Internet pioneer and computer-science professor at Carnegie-Mellon University in Pittsburgh, said the circumstances are also notable because it will be the first time that routine U.S. monitoring of e-mail traffic has led to an arrest.

"That's the first admission I've actually seen that they actually monitor Internet traffic. I assumed they did, but no one ever admitted it," Mr. Farber said.

Officials at the NSA could not be reached for comment. But U.S. authorities are uniquely positioned to monitor international Internet and telecommunications traffic because many of the world's international gateways are located in their country. And once that electronic traffic touches an American computer -- an e-mail message, a request for a website or an Internet-based phone call, for instance -- it is routinely monitored by NSA spies.

"Foreign traffic that comes through the U.S. is subject to U.S. laws, and the NSA has a perfect right to monitor all Internet traffic," said Mr. Farber, who has also been a technical adviser to the U.S. Federal Communications Commission.

That's what happened in February, when NSA officers at Fort Meade intercepted a message between correspondents in Britain and Pakistan, The Sunday Times reported. The contents of that message have not been revealed, but are significant enough that dozens of intelligence officials were mobilized in Britain, Canada and the United States.

The intelligence officers at Fort Meade rely on a sophisticated suite of supercomputers and telecommunications equipment to analyze millions of messages and phone calls each day, looking for certain keywords or traffic patterns.

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