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I'm looking for a way to create an encrypted folder on the sd-card and provide password protected access to its contents. Ideally, this would provide a UI to encrypt new files by moving files to it and retrieve them back.

I know there is EncFS but it only works in rooted devices. And also BoxCryptor which is only for Google Drive or DropBox.

I need a solution which would work with sd-card folders and on unrooted devices.

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See also these previous similar questions: Locking SDHC Memory card on Samsung Galaxy 2 and How do I secure/encrypt SD card data transparent to apps? – GAThrawn Jul 11 '12 at 10:51
"Is there an app that does X" questions are generally not a good fit here. (Please see the FAQ.) I've edited your question to ask for a solution to a problem rather than an application. – Al E. Jul 11 '12 at 14:10
ok, I changed the title to comply with your comment. thanks – Behzad Momahed Heravi Jul 11 '12 at 14:18
up vote 8 down vote accepted

There are many available choices, depending on the features you need:

  • Cryptonite uses EncFS and requires root
  • LUKS also requires root and provides on-the-fly encryption (AES by default) to virtual folders
  • Eds provides encrypted containers and does not require root. It even is compatible to TrueCrypt.
  • DroidCrypt can encrypt single files or full directories. No root needed.
  • Encryption Manager is a file manager providing file encryption support, and so is AnDisk
  • FilesCrypter supports encrypted files and folders

And many more. Just check the examples, and take a look at the "also recommended" stuff on their market pages to find more.

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Thanks, I will buy and try Eds. It seems to have everything I needed. – Behzad Momahed Heravi Jul 11 '12 at 10:58
@BehzadMomahedHeravi There's also a free trial available if you want to check it first. Eds looks like the best choice to me as well, though I did not (yet) try any of those apps. Good thing about the TrueCrypt containers is, this way you can even safely store data in the cloud ;) – Izzy Jul 11 '12 at 11:43

There's LUKS Manager which is available in the Play Store. It also requires your device to be rooted, however.

It's also open source. I have not tried it myself however, so I can't comment on how well it works.

The closes you can get without a rooted device is probably full disk encryption.

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Thanks, but I'm specifically need an app which works on unrooted devices. – Behzad Momahed Heravi Jul 11 '12 at 10:59

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