Israel admitted Sunday it has been targeted in a mass cyber-warfare campaign that has witnessed millions of attempts to hack state websites since the start of its Gaza offensive four days ago.
The White House said Thursday it was considering an executive order on cybersecurity after legislation on infrastructure protection failed again in the Senate.
Oil giant Chevron was struck by the Stuxnet virus, a sophisticated cyber attack that tore through Iran's nuclear facilities and is believed to have been launched by the United States and Israel.
Canada "has been slow" to set up firewalls to protect against cyber threats to critical infrastructure, leaving the nation vulnerable to crippling attacks, the auditor general warned Tuesday.
Middle Eastern oil and gas companies have been targeted in massive attacks on their computer networks in an increasingly open cyber war where a new virus was discovered just this past week.
Banking giant HSBC said Friday some of its websites had been hit by a "large scale" cyber attack that disrupted online services, but it assured customers that their data were not compromised.
Britain launched a new spy recruitment drive on Thursday aimed at "Xbox generation" youngsters without a university education but with social media and computer game skills to counter the threat of cyber attack.
The United States believes Iran was behind a major cyberattack on Saudi Arabia's state oil company and a Qatari gas firm, a former US official who has worked on cybersecurity issues said.
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.
The Swedish government said on Thursday it planned to crack down on hackers, at a time when the sex assault allegations against WikiLeaks founder Julian Assange has made the country a target of repeated cyber attacks.