A while back I posted about a guy discovering that through forensics you could get tons of data off a used iPhone. There was a method to wipe iPhone data, but it require jailbreaking the iPhone and then doing a much of command line stuff. I doubt the average consumer did it.
So now the same man has delivered a much simpler system. Jonathan Zdziarsk has created an app for the iTunes store that securely erases your data from the iPhone. It is called, of course, iErase.
Zdziarsk describes just how easy it is to use:
Q. I am selling my iPhone / iPod. What should I do?
A. Before running iErase, you should reset all of the information on the iPhone. The most thorough way to do this is with a full restore, or a quick way is to “Reset all Settings” on the phone. The restore process only performs a quick format, however, and doesn’t wipe everything, and the “Reset all Settings” process only deletes your personalized files, and doesn’t even format the device. In both cases, you’ll want to follow up your restore by running iErase. Once your personal data is removed – keychain passwords, configuration files, email, etc., iErase will then wipe over all of that to ensure it is beyond recovery.