Malware aimed at smartphones rose by 46 percent in 2010 compared to the previous year, says McAfee.

According to the security firm's security report of Q4 of 2010, attacks on Google's Android mobile OS are on the rise, as hackers turn their attention away from the previously popular Symbian platform.

"As more users access the internet from an ever-expanding pool of devices - computer, tablet, smartphone or internet TV - web-based threats will continue to grow in size and sophistication," McAfee said.

The report also revealed that the amount of spam sent worldwide has fallen by 62 percent since the beginning of 2010 and now accounts for 80 percent of all emails sent. However, McAfee said spam levels were likely to rise again and blamed the decrease on the number of botnets that had suddenly stopped spaming over the Christmas period.

See also: Mobile phone hacking - can you stop it?