King Saud University
With the advent and rising popularity of wireless systems, there is a proliferation of small-enabled devices such as PDAs, mobile phones, etc. While these devices are becoming more and more preferable by all age groups, they also pose the threat of being vulnerable to malicious code (e.g.: viruses, trojans, worms, etc). In fact, the mobile devices rely on open and public transmission media. Besides, open platforms are becoming popular in smart phones. In this paper, these devices have become more capable, providing users with all conveniences, ranging from traditional phone usage to supporting multiple features like e-mail access, playing games, software downloading and also e-banking.