Disable ctrl+shift+s of browser plugin

Hi,

I have an pdf document which opens in a popup window. I dont want it to be saved to user system.

I know that first this file will download to cache and this can not be prevented. Its okey.

I have hidden the brower file bar and acrobat reader's save bar. So user do not have any visible option to save the pdf

But when he press (ctrl+shift+s)  the save as prompt window pops up. Can I stop this.

I do have the acrobat. Is their any option in acrobat which can disable the reader plug's save as commnad

Please help.