
Traditionally, CISOs and their security teams thought about how best to defend security perimeters using such tools as firewalls, network intrusion detection systems and intrusion prevention systems (IDS and IPS). The approach was to keep the crown jewels – the company’s proprietary data and applications – protected inside the perimeter. Mobile computing busts this concept wide open. Mobile users will be outside the perimeter, will be accessing data and applications over the Internet and often from a device over which the CISO has no control, such as a ‘bring your own device’ (BYOD) laptop, tablet, or smart phone; a PC in an Internet cafe, or an Internet TV in a hotel bedroom.