I have a client - A Dishwasher / Oven / Appliance repair company that has had issues with dishonest staff in the past stealing sensitive commercial information.

They asked me if they could give access to a directory of pdf's on their server to a bunch of tablets, but prevent those files from being copied to the tablet itself or to the sd card / dropbox or any other storage medium?

I was thinking sure - a windows share accessible only over their office wifi network, but how would we prevent them from copying those pdf's to the tablet itself or micro sd card and taking them to the competition.

Any ideas?

Am thinking they may just need to give repair technicians access on a case-by-case basis to pdf's as they need them so they cant get bulk access - so it would take years to collect a couple of hundered from the thousands of pdf files they have sitting on their file server.