An executive at Google said it was not aware of the alleged³ activity, adding there was an "urgent need for reform".

 

The comments follow a Washington Post report based on leaks from Edward Snowden claiming that the NSA hacked links connecting data centres operated by Google and Yahoo. 

 

The NSA's director said it had not had access to the companies' computers.

 

Gen Keith Alexander told Bloomberg TV: "We are not authorised to go into a US company's servers and take data."

 

But correspondents say this is not a direct denial of the latest claims.

 

 

The revelations stem from documents leaked by ex-US intelligence contractor⁴ Edward Snowden, who has been granted temporary asylum⁵ in Russia and is wanted in the US in connection with the unauthorised disclosures（公开，披露）.

 

The documents say millions of records were gleaned⁶ daily from the internet giants' internal networks.

 

They suggest that the NSA intercepted⁸ the data at some point as it flowed through fibre-optic cables and other network equipment connecting the companies' data centres, rather than targeting the servers themselves.

 

The data was intercepted outside the US, the documents imply.

 

The data the agency obtained, which ranged from "metadata' to text, audio and video, were then sifted⁹ by an NSA programme called Muscular, operated with the NSA's British counterpart, GCHQ, the documents say.

 

The NSA already has "front-door" access to Google and Yahoo user accounts through a court-approved programme known as Prism.

 

Google's chief legal officer David Drummond said Google did not provide any government with access to its systems.

 

"We have long been concerned about the possibility of this kind of snooping, which is why we have continued to extend encryption across more and more Google services and links, especially the links in the slide," Drummond said in a statement.

 

"We are outraged¹⁰ at the lengths to which the government seems to have gone to intercept⁷ data from our private fibre networks, and it underscores the need for urgent reform." 

 

A spokesperson for Yahoo said the company had "strict controls in place to protect the security of our data centres, and we have not given access to our data centres to the NSA or to any other government agency".

点击收听单词发音