If you have a MS Excel Workbook that contains sensitive information, you can password protect the workbook so that it can be safely transmitted via email or stored in a network file share. Be careful to not lose or forget the password as the workbook cannot be opened without it.
To encrypt and password protect your workbook, follow these steps in Microsoft Excel
If you're sending the protected file to someone via email, be sure to provide the password to the recipient through a means that is not email such as a phone call or text message.
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