Create an encrypted folder with OS X Disk Utility [Solved]

I run several servers on my mac, and worry about getting hacked or accidentally sharing sensitive files. In addition, I worry about sensitive files when I take the computer in for tech support, or when others use my computer. Documents such as my tax files contain my social security number.

I don’t have to worry any longer (until AES is cracked, anyway), because it is easy to create an encrypted disk image on OS X. I followed the instructions here:

http://blog.smalldog.com/article/1814/use-disk-utility-to-encrypt-files/

I chose a 2.5 GB image, which automatically suggested a CD/DVD type partition. I’m not sure what partition type to use but don’t think it matters. These were the settings I used:

This will create a .sparseimage file. Sparse images are nice because they don’t actually take up their entire hard drive space until they’re filled with contents.

Note that after you drag the files in, you still have to delete the originals. Then when you eject the encrypted image, they are protected. When you double click on the image again, it will ask you for your password. Don’t forget this password, because it is impossible to recover!

I used spotlight to search my computer for files containing my passwords or social security number. If they were necessary, I dragged them in here, otherwise I deleted them.

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