Security experts say attacks on smartphones are growing fast

Hackers are out to stymie your smartphone. Last week, security researchers uncovered yet another strain of malicious software aimed at smartphones that run Google s popular Android operating system. The application not only logs details about incoming and outgoing phone calls, it also records those calls.

That came a month after researchers discovered a security hole in Apple Inc. s iPhones, which prompted the German government to warn Apple about the urgency of the threat.

"We re in the experimental stage of mobile malware where the bad guys are starting to develop their business models," said Kevin Mahaffey, co-founder of Lookout Inc., a San Francisco-based maker of mobile security software.

Wrong-doers have infected PCs with malicious software, or malware, for decades. Now, they are fast moving to smartphones as the devices become a vital part of everyday life.

Some 38 percent of American adults now own an iPhone, BlackBerry or other mobile phone that runs the Android, Windows or WebOS operating systems, according to data from Nielsen. That s up from just 6 percent who owned a smartphone in 2007 when the iPhone was released and catalyzed the industry. The smartphone s usefulness, allowing people to organize their digital lives with one device, is also its allure to criminals.