Save username-password with NSUserDefault, how and how much safe?

Question

I would save a couple of values (username-password) with NSUserDefault.

First: is there a way to save them together (like in an array for example)? Second: is it saf

Answer 1

you can use an NSDictionary or NSarray to save your values, and you should also encrypt your data because NSUserDefaults works like a plist which can be accessed by anyone