How to send a string with security, iphone

How to send a string in most securely. Got some issue with encryption. My encrypted value in iPhone is not similar to webapp.

So please suggest the most secured form of开发者_如何学C sending a string from iphone (except encryption).

Thanks in advance.

There is no secure way of sending a string without using encryption. If you're sending passwords, which means that you don't need to be able to reproduce the original string, you could just send hash values.

If you have to be able to reproduce the original string I guess the easiest way is to just use SSL. If you don't want to buy an expensive certificate, you could use a self-signed certificate and bundle it with the application.