如何限制用户只能看到幻灯片，无法下载

Question

i am developing a cake-php application, under this i want to show powerpoint slideshow for the end user but the condition is that the user can only be able to see the show, not be able to download the slideshow. Can any one plz suggest the best way to do it.

Answer 1

If the slideshow is based on images you can split each image into 9,16 or more squares and display the tiled image. That way if the user decides to 'Save-as' the image he will get only 1/9, or 1/16-th of the real image. If the slideshow is quite big it will be a pain to put together all the pieces and will discourage the users to try and save the slide.

You can see such implementation here - http://whatismycar.com/info/16540/ - the 4 images below the header are in fancybox and if you try to 'Save-as' one of them you will save only a small tile of the original image.

Hope this helps.