How to export a PDF with pages as jpg or tiff, can not be modified by any editor (such as Illustrator or CorelDraw).
When I export from Indesign I would like to maintain a high quality (eg 300dpi resolution), but I do not want anyone can open with illustrator my pdf and can move objects like I was back in the indesign project.
There is a way to do this?
As far as I'm aware, other than password protecting the PDF (which can easily be circumvented), only raster-based PDFs would prevent easy editing of otherwise easily edited content such as text or vector objects.
Of course, even raster-based PDFs can be opened in an image editor such as Photoshop and manipulated as images. But in general editing raster-based PDFs can be much more of a chore than editing customary raster+vector based PDFs which InDesign and Illustrator both generate.
Simply, save or export the pages as jpg or tiff, then build a PDF from those images.
You can drag a group of jpgs to Acrobat to generate a PDF. Or use
File > Create > Combine Files into Single PDF... within Acrobat Pro to generate a PDF from multiple images/files.
There's no way, which I'm aware of, from within Illustrator or InDesign to generate a raster image only based PDF upon output. Unless, of course, your document is entirely raster based.
Within Illustrator, you could select all and choose
Object > Rasterize then save as a PDF. (Then undo to reverse the rasterization.)