State Department takes network offline for security scrub

The effort is the department's latest attempt to root out malicious software from Russian hackers in its unclassified email system, according to a report.

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The State Department's network shutdown this weekend may be related to a Russian hack last year.

The State Department has shut down parts of its computer network for the weekend as it looks to boost security.

The efforts are another attempt to ferret out malicious software tucked into the department's unclassified email system by Russian hackers last fall, according to an ABC News report on Friday that cited US officials.

The State Department released information on Friday about the shutdown, though it did not specifically note email or hackers.

"As a part of the Department of State's ongoing effort to ensure the integrity of our unclassified networks against cyberattacks, the Department is implementing improvements to the security of its main unclassified network during a short, planned outage of some Internet-linked systems," the government said in a statement. "There has been no compromise of any of the Department's classified systems, nor of our core financial, consular and human resource systems."

The threats from hackers who've cracked into government, corporate and individuals' private data -- from sensitive emails to medical records to bank accounts -- seem only to grow. The financial incentives for making off with such information, whether it's to enable criminal acts or government espionage, are incredibly strong.

Among the highest-profile security breaches in recent years, a hack at Target in 2013 yielded the credit card data of 40 million customers. Another at Home Depot last year exposed 56 million credit card numbers. Last fall, a hack into Sony Pictures highlighted the inner workings of the movie studio. In December, office supply chain Staples said a hack affected more than a million payment cards. And in January, insurance provider Anthem revealed that hackers had potentially accessed the personal data of 80 million people.

Last fall, the State Department temporarily shut down its unclassified email system to make repairs and security upgrades after "activity of concern" was detected on the system. According to ABC News, this weekend's shutdown is related to the one last fall.

State Department email has been a much-scrutinized topic in the past two weeks because of revelations over former Secretary of State Hillary Clinton's use of personal email during her tenure. The department's current shutdown, however, appears to be unrelated.

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