Citigroup admitted on Wednesday that an attack on its website allowed hackers to view customers' names, account numbers and contact information such as e-mail addresses for about 210,000 of its cardholders.
Sony began restoring full service on its Qriocity entertainment network to users in most countries on Thursday, a month and a half after the service was forced offline by a hack of its servers.
Hundreds of popular websites -- including Google, Facebook, Yahoo and Bing -- are participating in a 24-hour trial of a new Internet standard called IPv6 on June 8, prompting worries that hackers will exploit weaknesses in this emerging technology to launch attacks.
A 26-year-old U.K. man was arrested Thursday on charges that he tried to hack into the Facebook social-networking site.
Google has disrupted what it believes to be a targeted phishing campaign aimed at stealing e-mail from government officials, contractors and military personnel.
The U.K. Government is developing a "toolbox" of Internet cyber-weapons that could be used to attack other countries, Armed Forces Minister Nick Harvey said in an admission that the military now treats the Internet as a battlefield like any other.
Lockheed Martin Saturday night acknowledged that it its information systems network had been the target of a "significant and tenacious attack," but said that its security team detected the intrusion "almost immediately and took aggressive actions to protect all systems and data."
Sony's PlayStation Network online gaming service will reopen for millions of gamers across Asia on Saturday, more than five weeks after it was taken offline following a cyber attack.
The problems keep coming for Sony. On Tuesday the company confirmed that someone had hacked into its website and stolen about 2,000 customer names and e-mail addresses.
Sony expects the hack of the PlayStation Network and will cost it ¥14 billion (US$170 million) this financial year, it said Monday.
Israel is setting up a national task force to expand the state's ability to defend vital infrastructure networks from cyberterrorist attacks by foreign countries and terrorist elements, according to a <a href="http://www.pmo.gov.il/PMOEng/Communication/EventsDiary/eventcyber180511.htm">report on Wednesday</a> by the country's prime minister's office.
Millions of PlayStation users are once again able to shoot, fight and race their way through online worlds after Sony resumed online gaming service late Saturday and Sunday in many major markets.
Sony will begin a phased resumption of its PlayStation Network and Qriocity services on Sunday, more than three weeks after a cyber attack that resulted in the loss of personal information on more than 100 million customers.
Sony appears to be close to ending a two-week long outage of its PlayStation Network. The company said late Thursday that it is in the final stages of internal testing of the new system, but it stopped short of saying when the popular online gaming service would resume operations.
Sony said it has found no link between an attack on its PlayStation Network and Qriocity services and Internet activist group Anonymous, which had earlier targeted its systems.