How secure are the app settings on the iPhone?

Question

It appears that each app has access to its own config settings, which could be kept after app be shutdown. I am wondering whether one app's config setting could be accessed from other app.

Should I save sensitive data like password to the app config?

Is there some better way?

Answer 1

The Keychain is where passwords or other sensitive information should be saved.

Answer 2

Buzz Andersen has code that will get and set Keychain passwords correctly on both the simulator and on the iPhone: SFHFKeychainUtils.