And since it's a public network, it's always vulnerable to attack. Elgamel also emphasizes the security chain required to tie together business rules and requirements, application security, network infrastructure, and data management policies and the security needs of each area, such as the need to change business practices, the need to monitor applications and the network and the need to manage data. Security is not the crunchy exterior that the firewall model implies where when you break through the exterior you have access to all your company's assets. You need to think about protecting your assets every step of the way. You need to think more about maintaining your most precious assets in more of a 'gooey' center.
Security is a continual arms race between attackers and defenders.
This is how we need to think to slow the attackers down and empower the network.