Objective-C, how to obfuscate or encrypt NSString?

Question

I have an NSString (which is a path to a file) in my code that I would like to somehow obfuscate or encrypt,

but still be able to call up the file path easily when n

Answer 1

(This is an old question, but I'm replying anyway)

There's no such way to in Obj-C. Obj-C is dynamic enough that any of these methods can be trapped and intercepted. Do not ship anything in a application that absolutely needs to be secret. If your application is run on a jailbroken phone, or if it is made available on piracy sites, than it has already been exposed and it's memory contents dumped. All these above methods copy the decoded data to main memory where it is exposed.

See: https://www.youtube.com/watch?v=Ii-02vhsdVk

None of these methods above is actually secure. Again, do not embed these sorts of things in your applications with an assurance they are actually secure.

Answer 2

What I have done in the past to obfuscate a string was something to this extent:

-(NSString*)myString {

    NSString *string = nil;

    string = [@"ozzzzzzzzzzzzhazzzzzzzizzzzzz" stringByReplacingOccurrencesOfString:@"z" withString:@""];

    return string;
}

What it would do is remove all the occurences of the letter z, leaving you with ohai as a string. Not sure if this will suffice for your case, but it has worked for me.

Hope this helps!