How to protect PDF file from indexing?
I have link to PDF document on a public web-page. How to prevent search engines to index this link and PDF document. The only idea that came to my mind is to use captcha. However I wounder if there are any magic words that tell an engine do not index following link and PDF document? Any options using PHP or JavaScript are also fine.
Just to make it clear, I do not want to encrypt PDF and protect it with password. Just want to make it invisible for search engines, but not for users.
I have link to PDF document on a public web-page. How to prevent search engines to index this link and PDF document. The only idea that came to my mind is to use captcha. However I wounder if there are any magic words that tell an engine do not index following link and PDF document? Any options using PHP or JavaScript are also fine.
Just to make it clear, I do not want to encrypt PDF and protect it with password. Just want to make it invisible for search engines, but not for users.
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