(AP) -- One of the United States' biggest challenges in securing government computers from foreign attacks isn't necessarily technical. The country first needs to figure out how much those networks are worth and how much the U.S. should spend on protecting them, the new Homeland Security official in charge of that effort said Thursday.

A Swiss blogger who campaigns against Internet fraudsters said Thursday he was questioned by police after thousands of emails were sent purporting to claim he was going to commit suicide.

(AP) -- Lenovo Group Ltd., the world's No. 4 PC maker, said Thursday its quarterly profit rose 65 percent as strong sales in China and emerging economies offset weakness in the United States.

(AP) -- Federal authorities are calling it the largest hacking and identity theft case yet. But this week's indictments of 11 people who allegedly plundered millions of payment card numbers might not seriously dent the underworld where such crimes occur.

(AP) -- Google Inc. said Wednesday that it has launched a music search service in China that allows users to access music legally online in a forum backed by some record labels and supported by advertising revenue.

(AP) -- A newly discovered flaw in the Internet's core infrastructure not only permits hackers to force people to visit Web sites they didn't want to, it also allows them to intercept e-mail messages, the researcher who discovered the bug said Wednesday.

(AP) -- One of the biggest problems with the so-called Web 2.0 movement has been its encouragement of oversharing - which often means underestimating security risks. Adding doodads of varying quality to a home page can add a lot of pizazz, but can also be fraught with danger, since they can open a door for hackers.

Computer security professionals crammed into a Las Vegas ballroom on Wednesday for the first public briefing on an Internet flaw that lets hackers hijack traffic on the World Wide Web.

(AP) -- The search box is everywhere online these days. It's built into Web browsers. It's incorporated into Web sites of all sorts. And it's a major driver of traffic and revenue for Google Inc. and the like.

MySpace announced Wednesday it is launching a website devoted to the US presidential debates.

(PhysOrg.com) -- Texas Hold'em poker has exploded in popularity over the past few years. Its popularity has extended to academic researchers, who are intrigued by the challenges of probabilities and decision-making in the face of uncertainty that players confront when playing the game. Now, poker-playing artificial intelligence systems, developed by a researcher at the University of California, San Diego School of Medicine, have been released for free use by the public.

(PhysOrg.com) -- Antivirus software on your personal computer could become a thing of the past thanks to a new "cloud computing" approach to malicious software detection developed at the University of Michigan. Cloud computing refers to applications and services provided seamlessly on the Internet.

Elpida Memory, Japan's leading global supplier of Dynamic Random Access Memory (DRAM), announced today that it is ready to launch 16-gigabyte Fully Buffered DIMM (FB-DIMM), the world's largest capacity FB-DIMM. Based on its own unique integrated packaging technology (stacked FBGA or sFBGA) with 2-gigabit DDR2 SDRAM Elpida has achieved development of FB-DIMM products that feature an ultra thin thickness of 7.7mm along with the world's largest capacity of 16 gigabytes.

(AP) -- Computers are far from being truly clean machines, but Dell Inc. and other PC makers are trying to make their own business operations greener.

(PhysOrg.com) -- How much gasoline would the nation save in the year 2035 if lightweight hybrid and plug-in hybrid vehicles dominated the marketplace? More than 68 billion gallons, or about half the fuel currently used each year by today's vehicles.

(PhysOrg.com) -- Today`s growing third generation (3G) of mobile data services are only a taste of what is to come. Now, European researchers are paving the way to a world where ultra-fast internet access is available from every mobile device.

(AP) -- It can scale mountains in a single bound and wend its way down the most wretched roads. It is the mighty cell phone signal - and the latest hope for bringing financial services to the world's masses who don't have access to banks.

(AP) -- Sprint Nextel Corp.'s up-and-down road to recovery continued Wednesday as the company reported adjusted second-quarter results that beat Wall Street expectations as well as a slower loss of subscribers.

(PhysOrg.com) -- By combining stretchable optoelectronics and biologically inspired design, scientists have created a remarkable imaging device, with a layout based on the human eye.

A recent case study on using hydrogen to store the electricity generated by a mix of wind and nuclear power in Ontario, Canada, has shown that the hydrogen addition won`t be worth the cost, at least not at the current state of hydrogen technology development.