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.
A secure PDF file enforces copyright laws with features to prevent reproduction or distribution by other users. The owner or creator of a PDF file can restrict user access, printing, text copying and document editing with password protection.. Open the PDF file. If you need a password to open the file, then you will need to download encryption-breaking software. This method is very CPU-intensive, and even the simplest passwords can take days to crack, leaving your computer unable to perform any other tasks during that time.