Usernames, passwords, etc. These documents are password protected themselves, but if they're anything like "protected" PDFs, they're pretty easy to crack.

Learn how to unprotect Excel sheets or workbooks without a password using this simple step-by-step guide. No software required!

A recommended approach to secure your most private documents — whether it’s a PDF, Word file, or Excel spreadsheet — is to lock them with a passcode. While this does help keep sensitive ...