The Golden Ratio is a mathematical ratio, represented by the Greek letter phi, found in art, architecture, and nature, and is thought to represent a classic, innate, harmony of measurement. Most plastic surgeons know this, and also know that most faces do not have the classic golden ratio measurements.
Open the PDF and choose Tools > Protect > Encrypt > Encrypt with Password. If you receive a prompt, click Yes to change the security. Select Restrict Editing And Printing Of The Document. All Adobe products enforce the restrictions set by the permissions password.
There are sometimes genuine reasons to unlock or crack a password protected PDF file. You have the legal right to open the encrypted PDF document but forgot the password like in the case below. Say a former colleague created some critical sales reports in PDF format but he is not working with the company anymore.