When using a laptop, an encrypted HD/SSD can be an important security measure. However, laptops are prone to accidents (fluid spills, dropping on the floor, etc) that may mandate some or all of the components to be replaced.
Are there hard disk encryption schemes that tie the encryption key to other hardware than the HD?
Meaning the drive would be unreadable when it's plugged into a machine other than the (destroyed) original one. Just to avoid them when using a laptop ;-)