If you have sensitive data you'd like to keep from prying eyes in a Microsoft Excel file, the easiest way to protect it is with Excel's built-in password tools.

Sending Excel files containing crucial financial and business data has risks. To add a layer of protection, you should learn to password protect an Excel file.

Excel allows you to lock specific areas of a sheet with a password or protect the entire workbook. You can also set an Excel file to open in read-only mode and ...