How to create PDF in InDesign so that users who download PDF from website are unable to change words

[JoAnn H]

Hi,

When PDF is created from InDesign document (classroom lesson), then uploaded to my website, then PDF is downloaded by website visitor (teacher) -- is there a way that no words can be changed in the PDF?  I may be mistaken, but it appears that my lesson can now have word changed by the teacher end-user.

Thanks,

JoAnn

[BobLevine]

You can set security to "protect" a PDF but I warn you...it's hardly difficult to get around. Many PDF readers don't honor it.

[Eugene Tyson]

You can outline all the text for the document too.

https://creativepro.com/converting-text-to-outlines-the-right-way/

But this will also remove any way to search the text and also other functions.

[Test Screen Name]

Really, there is nothing you can do. And why would you go to trouble to make things harder for teachers to do their job? Customising their teaching is surely a real need.

[Geоrge]

You can always check your source with new version of this document and find difference in Acrobat Pro.

Here you go - 

https://acrobat.adobe.com/us/en/acrobat/how-to/compare-two-pdf-files.html

You can do your certificate and apply it to pdf. Any pdf that will be without your certificate - you will know that somebody do some changes with your file: https://helpx.adobe.com/acrobat/using/certificate-based-signatures.html