Microsoft SharePoint 2010 Unleashed

Realizing Security by Deploying Multiple Layers of Defense

Because even the most secure infrastructures are subject to vulnerabilities, deploying multiple layers of security on critical network data is recommended. If a single layer of security is compromised, the intruder has to bypass the second or even third level of security to gain access to the vital data. For example, relying on a complex 128-bit “unbreakable” encryption scheme is worthless if an intruder simply uses social engineering to acquire the password or PIN from a validated user. Putting in a second or third layer of security, in addition to the first one, makes it that much more difficult for intruders to break through all layers.

Transport-level security in Windows Server uses ...