While the ASUS Eee PC 901 doesn't have its solid-state disk drives encrypted by default, if you are storing any potentially sensitive information on this netbook -- or any mobile device for that matter -- you really should encrypt the data. When you lose a mobile device or it has been stolen, it can be a nightmare if your banking information was stored on there or even just passwords to your Internet accounts. However, what is the performance cost for fully encrypting a hard drive on one of these Intel Atom computers? In this article we are looking at the performance impact of fully encrypting the solid-state storage versus an unencrypted LVM within Ubuntu Linux.
I'm glad for the Private directories in Intrepid, I think that's the Right Way to do things, less wasteful and all that.
Depends on how much security you require. Sensitive files may end up in your swap partition or in /tmp or /var for instance. With all partitions encrypted you can be certain that nothing ever touches the disc unencrypted, regardless of bad/unknown program behavior.
Also when the pc is accessable to somebody with a live system the initrd can be modified - as this is not encrytped. And when you do that, you could store the key where you can find it when you come back...