The best solution to secure your PDF Documents is with a custom password to protect against sensitive data leaks. I refer to a PDF Protector tool capable of simultaneously making high-security PDFs with unique passwords on multiple PDFs. the tool is giving a risk-free technology to users. to restrict unauthorized users and third-party applications from modifying sensitive data and keep it in a specific location on the user's desktop. This application is an easy-to-use solution because of its user-friendly interface. It runs on any Windows version on it. You can test this tool with its free trial version.