I was searching for the current status of iPhone security: there are many discussions on the subject but a lot of them are mostly hand-waving or related to old bugs/iOS weaknesses.
How secure an iPhone (4S+, iOS6+, 4 digits PIN, wipe after 10 unsuccessful attempts) is against dedicated attacks on data at rest (typical scenario: someone steals the phone and wants to access data within (emails, contacts, ...)). The phone is assumed to be patched with the current iOS -- I am looking for flaws more than bugs (which are likely to be fixed).
I want to put aside James Bond like scenarios and government-enabled spying (PRISM and similar), rather concentrating on enterprise espionnage (= reasonable money available to break a stolen iPhone). The closest I have come to so far is via the DFU (but I do not know if this is still current).