A Yahoo sign at the company's headquarters in Sunnyvale, Calif. The company has announced a hacking of user accounts that happened in 2013, but it says payment card information was not accessed. Marcio Jose Sanchez/AP hide caption

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Marcio Jose Sanchez/AP

The Nest thermostat is an Internet-connected device. Security technologist Bruce Schneier says that while Internet-enabled devices have immense promise, they are vulnerable to hacking. George Frey/Getty Images hide caption

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George Frey/Getty Images

Despite Its Promise, The Internet Of Things Remains Vulnerable

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WikiLeaks founder Julian Assange participates via video link at a news conference in October marking the 10th anniversary of the group. Markus Schreiber/AP hide caption

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Markus Schreiber/AP

Beth Cobert says cybersecurity has been boosted since she took over as acting director of the Office of Personnel Management last summer. Manuel Balce Ceneta/AP hide caption

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Manuel Balce Ceneta/AP

One Year After OPM Data Breach, What Has The Government Learned?

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People walk past a TV screen showing a poster of Sony Picture's "The Interview" in a news report, at the Seoul Railway Station in Seoul, South Korea. The FBI says North Korea hacked into Sony Pictures computer systems as retribution for the film. Ahn Young-joon/AP hide caption

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Ahn Young-joon/AP

Dartmouth College researcher Timothy Pierson holds a prototype of Wanda, which is designed to establish secure wireless connections between devices that generate data. Eli Burakian/Dartmouth College hide caption

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Eli Burakian/Dartmouth College

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. Julie Jacobson/AP hide caption

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Julie Jacobson/AP

From Reagan's Cyber Plan To Apple Vs. FBI: 'Everything Is Up For Grabs'

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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. Mark Wilson/Getty Images hide caption

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Mark Wilson/Getty Images

Authorities say several publicly traded companies, including Clorox, Caterpillar and Viacom, had press releases stolen and used to implement an insider-trading scheme. Spencer Platt/Getty Images hide caption

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Spencer Platt/Getty Images

Hackers say they took control of a Tesla Model S through the car's computers. Tesla Motors says it is updating its systems with a patch to fix the vulnerability. Tesla Motors hide caption

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Tesla Motors

Tesla Model S Can Be Hacked, And Fixed (Which Is The Real News)

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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. Steve Marcus/Reuters/Landov hide caption

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Steve Marcus/Reuters/Landov

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. Chip Somodevilla/Getty Images hide caption

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Chip Somodevilla/Getty Images

In Data Breach, Reluctance To Point The Finger At China

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