NSA allies with Internet carriers to thwart cyber attacks against defense firms

The National Security Agency is working with Internet service providers to deploy a new generation of tools to scan e-mail and other digital traffic with the goal of thwarting cyberattacks against defense firms by foreign adversaries, senior defense and industry officials say.

The novel program, which began last month on a voluntary, trial basis, relies on sophisticated NSA data sets to identify malicious programs slipped into the vast stream of Internet data flowing to the nation’s largest defense firms. Such attacks, including one last month against Bethesda-based Lockheed Martin, are nearly constant as rival nations and terrorist groups seek access to U.S. military secrets. The prospect of a role for the NSA, the nation’s largest spy agency and a part of the Defense Department, in helping Internet service providers filter domestic Web traffic already had sparked concerns among privacy activists.