how to add secutiti code on last one link

how to add security code on last one link before open original pictures to prevent download spam with offline browser downloader....?

I'm afraid this is not

I'm afraid this is not possible, what you can do is to allow downloading of originals only to registered users. You can revoke download rights to guests in Setup->Groups


i want to say in link
to open original pictures link
to apruve open link, first request securiti code, same at coments but replace post buton with original link

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