These days, the news is all about big brother watching us. You can’t open a newspaper of watch news on TV without being slammed with the news that one or the other intelligence agency is actively gathering information from other nations or important enterprises.
Especially the later case makes one wonder what you can do about it? I don’t believe there is a 100% safe system. However, there’s nothing wrong with trying to make an attacker’s life as hard as possible. There are many ways to do this and having a multi-layered defense is what you should be looking at. However, it’s not only about protecting your network or access to your network, it’s also about protecting your applications.
Recently, I wrote an article about some simple things you can do to secure your Exchange messaging environment. If you want to know more about it, have a look at my latest article for Search Exchange: http://searchexchange.techtarget.com/tip/Build-an-enterprise-security-strategy-for-Exchange