Apple Mac, iPhone no longer Immune to Hacks

"[The iPhone] uses a version of Mac OSX, which is in turn based on Unix," F-Secure said. If you understand Unix security, then you can relatively easily 'port' your knowledge and understanding to the iPhone."

News of Apple's growing attacks comes as the number of viruses and other malware has doubled over the past year.

F-Secure had detected 500,000 viruses, trojans and worms in 2007, compared with 250,000 last year.