U.S. cyber intelligence firm iSight Partners linked the incident to a Russian hacking group known as "Sandworm."
The group posted pictures of the Turkish flag and Mustafa Kemal Atatürk.
A congressional advisory body says retaliating would make hacks more costly to perpetrators.
The hacking compromised information in 83 million household and small business accounts.
A new report suggests that some facilities could be hacked using "nothing more than a flash drive."
Director of National Intelligence James Clapper said his approach will be to "trust but verify."
The Chinese president put on a good show with governors and tech execs in Seattle, but what did it all amount to?
Malicious iPhone and iPad programs identified.
We need to target potential terrorists with the techniques of our digital ad companies, who know you better than your mother does.
An interactive map by Norse, a threat intelligence firm, visualizes the global cyberwar in real time.
The hackers allegedly aimed to get personal-identity information.
U.S. officials suspect the cyber attack on the Office of Personnel Management, which collects information for federal employees, originated in China.
Experts warn that a cyber attack on the national grid or water infrastructure could have "catastrophic" effects.
WikiLeaks on Thursday released an online searchable database of more than 30,000 documents obtained by hackers in a massive cyber attack last year.
Hacker collective strikes dozens of Israeli websites but fails to hinder government's online presence.
Tech leaders who are at odds with the administration over government surveillance stayed away from his speech.
The former NSA contractor thinks the U.S. has been too focused on offensive capabilities.
Xbox Live services were restored on Friday and Sony's PlayStation late Saturday following the Christmas Eve hack.
Files leaked include executives' salaries and a script from the Breaking Bad creator
Head of NSA warns that we could soon see cyber attacks regularly attacking critical infrastructure
The attack marks one of the largest data breaches in history