I think these are connected to a second NIC.
This is simply confusion. Everything on the device is encrypted. Attachment that I sent via email may not be being sent encrypted. That's where the confusion lies.
First off, what's "pure CS?" Is there a grad school of adulterated CS? Then, get this book: http://www.amazon.com/s/ref=nb...
If aliens read slash dot they would skip earth and move on to find intelligent life!