A pedestrian walks by an Apple store in New York City on Feb. 23. Protesters demonstrated against the FBI's efforts to require the company to make it easier to unlock the encrypted iPhone used by Syed Rizwan Farook.
Secretary of Defense Ash Carter (left) says the Pentagon's new hacker program will strengthen America's digital defenses. Carter is seen here with the chairman of the Joint Chiefs of Staff, Gen. Joseph Dunford.
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Authorities say several publicly traded companies, including Clorox, Caterpillar and Viacom, had press releases stolen and used to implement an insider-trading scheme.
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Chris Valasek (left) and Charlie Miller talk about hacking into vehicle computer systems during the Black Hat USA 2014 hacker conference in Las Vegas last August.
Adm. Michael Rogers, NSA director and head of the U.S. Cyber Command, has avoided singling out China for blame in the OPM hack, which may affect as many as 18 million federal workers.
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Dmitri Alperovitch, co-founder of the cybersecurity startup CrowdStrike, says his company is building stockpiles of intelligence about potential hacking groups.