Originally Posted by ramsforums
Thanks for the inputs. If I encrypt the hard drive will there be a performance degradation?
The encryption / decryption process will consume some resources. My experience has been that the associated penalty is small and I have never noticed a problem. You could also choose which portions you want to encrypt and focus on those as oppose to the whole drive. For example, do you really care if the Linux distribution binaries are encrypted? Does your entire home or /var partition need to be protected, or only a small amount? Another thing to consider about encryption, is that the drive needs to be decrypted to be used. If someone gains access and the information is already mounted in decrypted format, they may be able to access it. The encryption works well when starting from an unmounted or non-powered state.
It sounds to me like you need to perform a risk / threat analysis and devise a solution across multiple layers.