AES Encryption for an NSString on the iPhone

Question

Can anybody point me in the right direction to be able to encrypt a string, returning another string with the encrypted data? (I\'ve been trying with AES256 encryption.) I w

Answer 1

@owlstead, regarding your request for "a cryptographically secure variant of one of the given answers," please see RNCryptor. It was designed to do exactly what you're requesting (and was built in response to the problems with the code listed here).

RNCryptor uses PBKDF2 with salt, provides a random IV, and attaches HMAC (also generated from PBKDF2 with its own salt. It support synchronous and asynchronous operation.