Security Pros: iMessage Security Is a Myth
Apple's iMessage instant messenger service, which has made headlines for being uncrackable by law enforcement, may not be so secure after all. An internal DEA document published in April stated that it was impossible to intercept iMessages between two Apple devices. Not so, said Quarkslab researcher Cyril Cattiaux, who identified weaknesses in its end-to-end encryption.
http://www.macnewsworld.com/rsstory/79230.html