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There are several options available to you to protect your Excel file with a password. Remember that once you protect the Excel file, you cannot open it without entering the password.
If you would like to make sure that your Excel spreadsheet data is secure this guide will show you how to password protect and hide worksheets ...
People tend to use passwords to protect their Excel files for numerous reasons. For example, if you are having sensitive data with regards to your business in an Excel file, you need to password ...
How to Recover an Excel Password in OS X. The Mac operating system provides a way for you to lock Excel with a password to prevent unauthorized use by using Keychain Access.