Security devices are becoming increasingly high-tech. Most offices and similar buildings have simple security devices such as ‘swipe cards’ that admit only authorized people to the premises. Other technologies are becoming more common (although perhaps more in movies than in reality) such as finger print, iris and face scanning. Explore websites that deal with advanced security technology and gain some understanding of their state of development, advantages and disadvantages. Use this understanding to design a security system for an office building with which you are familiar. Remember that any system must allow access to legitimate users of the building (at least to obtain information for which they have clearance) and yet provide maximum security against any unauthorized access to areas and/or information.