The main goal: To protect any bootable disk (OS disk) from being accessed by attaching it to another system.
Many DVRs have their own filesystem, so if you would try to attach its hard dive to another system, the files there could not be accessed.
In Linux installation, are we able to make our own filesystem derived from, for example, ext4 or ext3, so any other Linux system would not be able to read the disk, so it (the hard drive) will work only as master and booting up the system?
By that way, any file/directory permissions will not be overridden by attaching the drive to another system and then using the
The scenario explanation
A web application should be delivered to another company on a machine (PC) that will act as a server. We need to add extra layer of security for our code. On the OS we will restrict access to the application's files to
www-data, the Apache user, and Apache will work as a service.
So in that company, just press the power button on of the server's machine, it will run the web server and serve the application, and for any reason they need to restart the server, again it will run again.
The basic idea, is to prevent any unauthorized trying of detached the drive and reattach it to another system to get the application's files. It is clear that encryption will not work smoothly like that way and need our contribution to restart the server.