Hi guys, First, let me say I already checked stack overflow and Apples documentation. Theres a ton of information and I'm not sure how to weed through it all. All I need to do is use RSA encryption to encrypt a string (no decrypting). What would I use to do that in iOS that does not require a 3rd party library. (A 3rd party library is not an option). I've heard mixed from Security.h framework (which the documentation for just doesn't exist, Xcode doesn't even find it), to a feature in Keychain lets you do it, to "it's impossible". I just can't find a concrete way or example how to do this. Does anyone have any suggestions or could you steer me in the right direction on what to use?