As one of the world's most impoverished powers, North Korea would struggle to match America's military or economic might, but appears to have settled on a relatively cheap method to torment its foe.
The United States faces a growing threat of a "cyber-Pearl Harbor" and has drafted new rules for the military that would enable it to move aggressively against digital attacks, Defense Secretary Leon Panetta said late Thursday.
A controversial international accord billed as a way to beat online piracy has sparked a fightback led by Internet users in ex-communist countries who say the region's past underlines the need to defend freedom.
Iran is busy acquiring the technical know-how to launch a potentially crippling cyber-attack on the United States and its allies, experts told a congressional hearing on Thursday, urging the US to step up its defensive measures.
Hackers calling themselves the 'Iranian Cyber Army' have attacked the website of mainly Muslim neighbour Azerbaijan's state television station, the communications ministry said on Thursday.
The State Department faces thousands of cyber attacks every day, a top US official said Friday, refusing to confirm that hackers who breached their system in November were reportedly still lurking in the network.
France will soon launch a 1.5-billion-euro ($2 billion) plan to defend itself against "cyber war" as a strategic priority, Defence Minister Jean-Yves Le Drian said Tuesday.
A British student went on trial in London on Thursday accused of a series of cyber-attacks by the hacking group Anonymous that cost the US online payments giant PayPal millions of dollars.
Online attacks by ever-skillful hackers are a growing threat to the stability of the US financial system, according to a report by a top-level government panel released Tuesday.
Attackers hacking into American computer networks appear to be leaving "cyber fingerprints" to send a message that critical systems are vulnerable, the top US cyber-warrior said Thursday.