I would like to know if making a pdf 'searchable' somehow make it less secure?
closed as unclear what you're asking by Steffen Ullrich, schroeder♦ Jan 22 at 15:15
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If you are somehow making it indexable by search engines (like uploading it to the web), and considering that 'secure' in this mean is 'making the content unknown', then yes. Every word will be a keyword. If secure means, in other context, 'making content non-replicable', then the same applies.
Otherwise, if your need of security is to guarantee your .PDF file is yours and none's else, making it searchable won't change a thing.