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

Working with an Excel workbook that contains confidential information such as financial data, personal details, or trade secrets? Here's how you can protect the data in your Excel file from prying ...

How to Encrypt any File, Folder, or Drive on Your System Trust us, it’s safer this way. Photograph: Peter Dazeley/Getty Images ...

Encrypting Files To encrypt a file for yourself, you can use symmetric encryption: gpg --symmetric filename To encrypt for someone else, use their public key: gpg --encrypt --recipient [email] ...

Apple has several different encryption tools built into macOS, letting you encrypt your entire Mac or individual files or folders, and in this guide we'll show you how.

Can be dead simple. Step 1: Get document. Step 2: Save As a different file type (RTF is the go-to for Word docs) Step 3: Open new document, convert back. Edit: YMMV, I can bypass Word password ...

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.