File & folder authority problem

Dear Experts,

We have a share folder in NT server, I know how to set the authority that they can read the file only or let them to modify or create file etc., but how can I set the authority to avoid them to save as the file at other location, copy the content to the other page or print it out from the file etc. Do I need to use the third parties tools? Please give me some suggestion, thank you so much.
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kmliuAsked:
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edmonds_robertCommented:
If a person can read a file, they can copy it.  The only way to prevent someone from copying a file, is to prevent them from accessing it.
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mbrunerCommented:
I'm pretty sure edmonds_robert is correct.  If it can be read, then it can copied, printed, etc.
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lrmooreCommented:
Another vote for edmonds_robert. As long as someone can read the file, there is no way for you to prevent them from saving it somewhere else, cutting/pasting (copy) to another document, printing it, etc
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lrmooreCommented:
You could save the file in some proprietary format that requires the reader to download a special reader application that has copy/print/save functions disabled.
Something like a .pdf that requires Acrobat Reader, but the reader must be customized to disable those functions.
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erikdrCommented:
Well, if I'm not mistaken this IS functionality of Acrobat Reader. If you buy the full Adobe Acrobat, some of the options which you can embed in a PDF file are 'disable print' and 'disable copy to clipboard'. However the PDF file itself can still be copied etc.

Have fun,

<Erik> - The Netherlands
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kmliu:
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kmliuAuthor Commented:
Dear brother edmonds_robert,

Since I still cannot find the solution, so I only give you average mark. BTW, thanks for your share.

Regards,
kmliu
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