With the file open in Pages, Numbers, or Keynote, select File and then Set Password to choose and apply your password.

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.

You can add or remove a password from your Excel spreadsheets through the File tab. You'll do it slightly differently on a Mac and PC.

The widely used PDF format supports data-saving encryption, allowing you to protect sensitive documents so that only those with the correct password can access them. In the old days, you’d need a ...

How to Put a Password on a Folder in Windows. If your workplace computer is home to an assortment of classified company documents and important files, you would do well to consider password ...

Encrypt and password-protect your database in Microsoft Access. Learn how to set a Password on an Access Database.

How to Put an Encryption on WinRAR. File compression programs, such as WinRAR, enable you to reduce the size of files, which make it easier to email or store these archives.

We all have files that we'd rather not share with hackers and thieves (and maybe even our spouses). Here's how to put them in a place where no one else can open them.