Have a private document on your desktop OS? Here's how to keep it secure on Linux, MacOS, and Windows.

While documents created in Word, Excel, and PowerPoint are all encrypted using a single password, the documents in OneNote can be comprised of many different notes, spanning different notepads.

Next, select Encrypt a non-system partition/drive and select Next. Select the drive you want to encrypt and follow the instructions on the screen.

Open the Word, Excel, or PowerPoint file and head to File > Info. Select Protect Document (or Protect Spreadsheet, or Protect Presentation) and choose Encrypt with Password, then enter your password.

I use encrypted Excel 2007 documents to store some sensitive financial information on my Windows 7 laptop. To give me access to these off site I'm thinking of attaching a copy to an email message ...

How to Make Encrypted Letters. You can use Microsoft Word 2010's file encryption feature to encrypt any data you send, including letters to friends, family and business associates.