How do I destroy the unencrypted backup for my Bitcoin Wallet?

[BusyBeaverHP]

While auditing my wallet's backup, I noticed that there is an option to restore my wallet with an unencrypted backup!

First thing I did was sweep all my money out of there, second thing is to stop using that wallet... since I had inadvertently had an unencrypted backup of that for at least two months.

Where do I go to destroy that unencrypted backup? Is there a default behavior where I'm able to encrypt the wallet before it's generated? I hate the idea of having ANY unencrypted backup around, even for a few seconds.

[zetaray]

That file is already somewhere on your hard disk, and you don't know where it is written. The easiest way is to delete the file and copy large files onto your hard disk until it is full. Then the location of the wallet file data is overwritten with new useless data.

[BusyBeaverHP]

To Developer(s):

Having the program generate an unencrypted backup on a user's phone by default is a preventable security flaw.
Implementing encryption before wallet initialization as default behavior should be considered, like Electrum for example.

[Muhammed Zakir]

The only option to delete it atm is to root your phone. After deleting, just unroot it.

   ~~MZ~~

[Andreas Schildbach]

The issue has been fixed in version 4.14, released on December 15.