Apple advise using NSUserDefaults to store all your app preferences. However, it seems that NSUserDefaults is very easily editable. Is there a way to secure this. I'm not looking for a way to make it impossible to edit, just making it harder so that users won't be so tempted to change application internal variables.
7 Answers
If a piece of data is not sensitive (e.g., default font size), store it in NSUserDefaults.
If it needs to be secure from casual snooping (e.g., user's password), store it in the Keychain.
If it needs to be secure from the user (e.g., registration code), you will need to roll your own encryption, then store the data wherever you like.
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