nuh

Dear all, I want to share one of my pdf document using a link. I want to know if who visits the link could see the date of the last modification of the paper, and if that date is shown forever. Moreover I want to be sure that they cannot modify that. Thus, sharing a note with a link, I want to know if: can people, visiting the link, see the note date of the last update? is the date of modification shown forever? is sure that no one can modify the note? Thanks