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    To protect formulas, click Review, then click Protect Sheet. Passwords are optional. This article also explains the various protection options.
    To help improve your privacy in Excel 2007, a password adds protection to worksheets to help prevent others from changing, moving, or deleting important data.
    You can protect a sensitive or confidential document by using a password to help prevent anyone from being able to change or even access it.
    Add a password to protect your entire workbook and control whether others can open or make changes to it. Protect your file by setting passwords for Open and Modify.
    Using a strong password is among the most important steps you can take to protect your computer from hackers and other unwelcome users. For more information about ...
    Allow only authorized users to view or modify Excel 2003 data by securing your entire workbook file with a password.
    Help protect your account. Follow these tips to help keep your account safer and make it easier to recover if it's compromised. Create a strong password for your account.
    Your boss wanted you to protect a workbook, but she also wanted to be able to change a few cells after you were done. So, before you password protected the workbook ...
    If you don’t want others to see or change your formulas, hide and protect them from being viewed in worksheet cells and in the formula bar at the top of the worksheet.
    Protect a worksheet to prevent data changes or password protect it to prevent other people from removing the sheet protection.

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