Computer break-ins usually fall into one of two categories: network layer attacks (manipulation of routers, switches, network protocols, etc.), and application layer attacks (manipulation of programs you might employ like Email clients, office automation suites, browsers, etc.).

Since applications usually rely upon networking to function, it was a widely held misconception that securing the network layer alone would guarantee the security of the application layer. Many security service companies have expertise in networking technology, but they may not possess a strong knowledge of application internals. SecurityAppraisers® has both networking and strong application expertise, and the ability to foresee how applications might be abused.