I have not yet purchased the Hoster software but I do read the forums. First off, that would be totally illegal in all aspects, turn him/her in. Unless the dishonest employee went out and bought ALL originals and a complete rig, Hoster included, at great cost I might add. It would be easy to prove theft, besides, if they already had all this, they would have been working for themselves anyway.
On the other hand, as long as you are using a PC of any sort with an O.S. that has an administrator account and no external drives, use the O.S. in your favor. (NOT WIN 95, 98, 98SE or Me) as hitting cancel gets around almost all account restrictions.
If you have a dishonest employee or think you do get rid of them, it's your show. If you want to keep them or are just paranoid, try the following.
1). Do not use external devices in your shows. Allow CD/DVD burning software to run on the Administrator account only. This way you can still read the disk a patron may bring in.
2). In the system bios, disable as many external ports as it will allow.
3). Stop non-Windows or DOS type file transfers. Do not allow the system to boot from floppy, disable it. Remove it from the bios if your system bios does not allow you to disable it as a boot device.
4). Go into windows hardware configuration and disable external ports, (pcmcia ports on laptops) and network cards for all configurations. As an Administrator you can re-enable them as needed for updates.
5). Do not use PC or laptops with easily removed drives and routinely add and check tamper seals. Make this part of your rig checkout routine. If you don't have a routine, you should, after each show.
6). Maybe the most important thing of all. Do not let them take the system for longer than required to do the show including travel time to and from the site. It takes TIME to copy anything.
With this done there is no worry about encrypting or decrypting problems.
Dana