I've not done this with a raspberry pi but if the device is networked what about using the a remote x session. The slide images reside on an application server in a secure location even if the whole device is removed there is nothing on it. I did something very similar years back with diskless clients and a terminal server.
Cheers Alan On 2013-09-28 4:11 PM, "Jer" <[email protected]> wrote: > On 13-09-28 02:40 PM, Henry Olders wrote: > >> Hello, all, >> >> I want to run my raspi as a device for digital signage, the idea being to >> display images fullscreen in a slideshow, without any user intervention. >> I've got that running very well, using the raspbian distro, openbox window >> manager, and either qiv or feh as the image viewer. The slideshow starts >> automatically on boot, and runs forever, which is what I want. >> >> Here is the problem: my client wants to prevent his images from being >> copied, including being copied off of the SD card when physically removed >> from the raspi. Encryption would accomplish this, so I'm looking at getting >> truecrypt running on the raspi. >> >> The difficulty I foresee is that if someone plugs a keyboard and mouse >> into the raspi when it's running, they can access a terminal emulator which >> is already logged in as user pi, and (I think) copy the image files out of >> the truecrypt container into an unencrypted directory. >> >> There may also be other security issues that people with more experience >> know about. >> >> Any ideas or suggestions much appreciated! >> >> Henry >> >> > Use FBI instead which can run without anyone logged in. I use it for > slideshows on the pi. You can also use the video player, I forget the name, > but it is optimized for the pi. You don't need X at all, the framebuffer is > all you need. > > Another option is to use a screen locker program that will show the > slideshow. ie: Xscreensaver and use the GLSlideshow option. > > You could set permissions on the files so they are owned by root (or > another user) and only readable by root/user, then run the slideshow > program with sudo. > > The problem with encrypting the files is that if a reboot happens someone > has to go type a password in. > > The client is aware that they are displaying the images on a screen and > that anyone could record that screen? This is how I would steal them :) > > Jeremy > ______________________________**_________________ > mlug mailing list > [email protected] > https://listes.koumbit.net/**cgi-bin/mailman/listinfo/mlug-** > listserv.mlug.ca<https://listes.koumbit.net/cgi-bin/mailman/listinfo/mlug-listserv.mlug.ca> >
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