Whatever your pre-bias about Apple may be...give them credit where due.
They've designed a quite secure mobile ecosystem from day-one. It's not perfect, but they evolve...and quite rapidly (unlike other vendors we can indict that have been sloth-like. Note also how many person-decades those others have wasted on tech support disaster mgmt for us, for our family, friends, and colleagues).
They've utterly dominated the mobile industry profit-wise and don't seem to relent or relax (again, unlike others that go on 5-year hiatus until their monopoly-trapped customers have been immolated).
As others have mentioned, more info at Black Hat would've been great but they don't telegraph intentions and don't do FUD (unlike past IT history shows those others doing).
For a hint, Apple just bought AuthenTec, a fingerprint sensor firm.
(To those frothing at the mouth...no, Apple won't claim they invented fingerprint security, but it will likely be implemented delightfully in iOS 7 in the next 15 months. Just admit it and enjoy the ride -- and how the industry reaction will veer off to hysteria & desperation.)