Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Internet security is a component of computer security, which refers to online protection and fighting against attacks over the Net, backed by certain laws and measures aimed at preventing any type of intrusion, pagejacking, scam, intellectual property theft, fraud, or phishing etc. Often characterized as an insecure channel for information exchange, as well as for any personal and financial data, the online environment requires constantly new defense strategies against hackers, online piracy, Trojans, viruses, worms, spam and malwares. Learn more about the online security, its methods and services in this book.