The Internet plays an important role in our daily life. Today, everyone is “connected” to everyone else almost at any given instant as we are connected to the Internet most of the time and interacting with others through e-mails or instant messengers like Skype or are using some applications on the web. With the innovation of high-speed computing devices, large-scale deployment of wireless networks, Web 3.0, Cloud computing, and social networks, “always connected” is a reality. The Internet continues to grow exponentially. Most of the businesses are connected on and through the Internet. E-commerce, e-business, ...