The Pentagon is asking scientists to figure out how to detect and counter propaganda on social media networks in the aftermath of Arab uprisings driven by Twitter and Facebook.

The U.S. military's high-tech research arm, the Defense Advanced Research Projects Agency (DARPA), has put out a request for experts to look at "a new science of social networks" that would attempt to get ahead of the curve of events unfolding on new media.

U.S. mobile security firm Lookout is teaming up with U.S. telecom giant Verizon Wireless to protect Smartphone users from hackers and scammers.

Lookout Mobile Security and Verizon announced at the Fortune Brainstorm Tech conference in Aspen, Colorado, on Wednesday that Lookout technology would be used to scan applications in Verizon's mobile storefront.

South Korea's Samsung Electronics launched a new version of its Galaxy Tab in its home market Wednesday in a bid to lure consumers away from Apple's iPad.

Samsung, the world's second-largest mobile phone maker, also said it would in August launch an updated version of its Galaxy S Smartphone in the U.S. market, which is dominated by Apple's iPhone.

Google on Tuesday began warning some users of its popular Internet search service that their computers may be infected with a virus.

Routine maintenance on one of the technology giant's data centers revealed unusual traffic from computers infected with a form of malicious software, according to Google security engineer Damian Menscher.

Twitter could potentially generate revenue from commerce in addition to advertising, its current money-maker, the chief executive of the company said Tuesday.

Dick Costolo, speaking at the Fortune Brainstorm Tech conference in this Colorado ski resort, also dismissed reports of management turmoil at the San Francisco-based company and said it is still seeing explosive growth.

Websites owned by Rupert Murdoch's News International were down Tuesday after the Lulz Security hacker group replaced The Sun's online version with a fake story pronouncing the mogul's death.

The British tabloid quickly took down reports that the 80-year-old had been found dead in his garden after ingesting palladium but visitors to the site were redirected to LulzSec's Twitter feed, which celebrated the high-profile attack.

Microsoft on Monday offered its HealthVault as a new care center for digitized medical records kept at Google's dying Health service.

Google announced last month that it is pulling the plug on its free Health service because it hasn't flourished since its launch in early 2008.

Chinese search engine Baidu.com says it is launching a music download service with three global music labels in China in a deal that ends legal disputes with them.

Baidu said Tuesday it will distribute music online with Universal Music, Warner Music, and Sony Music and pay them for the content. The downloads are available only in China and will compete with a similar service run by rival Google Inc.

At the end of a long day, many gamers zone out by competing in online death matches, or they check out by escaping to virtual realms. Spiritual leader Deepak Chopra is hoping gamers will instead choose to chill out with "Leela," his ambitious new effort to combine gaming and meditation.

"I personally believe that you can accelerate neural development and biological evolution through video games," said Chopra. "Unfortunately, that's not what we're doing right now. What we're doing is creating addictions to violence, adrenaline and mindlessness, rather than mindfulness. That was my personal motivation to get involved in this medium."

South Korean student Hwang Jin-Joo no longer sends text messages to his extensive circle of friends, he "KaTalks" them.

Kakao Talk, a mobile messenger Smartphone application, has enjoyed phenomenal success since it was launched 16 months ago and has spawned similar apps in the world's most wired nation.