Are you trying to open a password-protected PDF or ZIP file? Then, you already know how frustrating it can be. You try out different tools, and the result is a ...

PDF files can contain everything from reviewer proofs of pre-publication books and under-development drafts of confidential intellectual property to proprietary financial data and personal information ...

Usually, bank statements or a phone bill, as well as confidential financial documents, are sent as PDF files, and most of them are password protected as they contain private and sensitive information.