Over the last decade, governments around the world have been investing in numerous technologies for increasing the security in their respective countries. One of the first steps in increasing security was at airports with a number of screening technologies being brought in. Further to this, physical intrusion detection systems were also brought in which together with other security technologies was able to improve the overall security for the airports in the country. Physical intrusion detection systems as the name suggests looks at just taking care of the physical security aspect and not logical access which would have included password access or system access etc. There have been a number of technologies, which have been used for quite some time, however, over the last few years, new technologies have been brought in which bring in their own bag of advantages. Keypad control has been used considerably and is slowly being phased out. Systems that are being brought in to replace k...