Posted by Mark Hinkle at LP blog:
The concept of “airport security” is actually Access Control. ”Access Control” is a catch-all concept that basically boils down to the idea of controlling who can’t get into a particular area and who can’t. Being stuck at airport security is something that everyone goes through. That’s why a lot of people use something like a TSA PreCheck to help them skip the queues where possible.
The reason that access control is impossible in an airport is very, very simple. The underpinning of all access control is this concept:
Deny access to everyone but a few individuals.
“Airport security” attempts the reverse:
Allow access to everyone but a few individuals.
This is flatly impossible.
Read the full article here: http://wrstone.wordpress.com/2010/11/16/airport-security/