Introduction

The Internet is becoming a more and more dangerous place to be, due in no small part to the inherent security risks posed by viruses and spyware. Additionally, applications that access the Internet as part of their normal operations may have errors in their code that allows hackers to launch attacks against the computer on which those applications are running. The safety and integrity of digital assets is further compromised by the fast-growing threat of cybercrooks who devise and implement large-scale hoaxes such as phishing and ID theft.

In the light of all this, it