by Karlis » Thu Apr 21, 2005 5:19 pm
Technically it is possible to take screenshots (even if PrintScreen is blocked), so there is no way to make the images inaccessible.
Anyway, image files are already stored in such a way that 99% of users or even good computer specialists will most likely not be able to extract your original image data, however there is no protection against taking high quality screenshots.
Strong encryption can not be used here because image data amount is pretty huge and it would simply cause performance decrease and other problems.
From the experience, the best way to protect media is to write not very long but very descriptive license agreement and include small copyright notice on all images. That is how most professional photographers handle this.