How to create an encrypted sparse disk image

Mac OS X offers you a smart built-in solution to secure your files and folders. It is possible to create an encrypted disk image, it is like a regular disk image but requieres a password to become mounted. How this works, I'd like to show you in the following steps:
  1. Open Disk Utility (press + SPACE and type disk utility).
  2. File > New > Blank Disk Image.
  3. Type a name in the Save As field. This name will be used for the disk image.
  4. Choose a preferred location to save the *.dmg file.
  5. Select a size for the disk image.
  6. Choose as volume format the default Mac OS X Extended (Journaled)
  7. Use "sparse disk image" for a disk image that only uses as much space as it needs, rather than a set amount of space.
  8. Choose 128-bit AES encryption (or 256-bit AES in Mac OS X v10.5 or later, but slower). I would suggest 128-bit AES encryption. 
  9. Click on "Create" button.
  10. Enter a strong password and don't forget to deselect "Remember password (add to keychain)" if you don't want it saved. Because if you do, your created disk image is less secure.

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