http://www.securitynewsdaily.com/2178-apple-text-message-imessage.html
Apple Admits Text Messages Insecure, Recommends iMessage Instead
Your friend just texted you on your iPhone. But how do you really know it's him?
According to a well-known Apple hacker, you can't.
According to Apple, you should be using the Apple-only iMessage service instead.
French iPhone hacker "pod2g" seemed surprised Friday (Aug. 17) when he posted on his blog that he'd figured out a way to "spoof" text messages, also known as SMS messages, so that they appeared to come from someone other than the sender.