It's easy to look at this through a cynical lens. Is Apple hiring Zdziarski to keep his very public discoveries under wraps, or to lend extra credibility to its security team with a high-profile name? Even if either of those are true, it's still an important move. It reflects the company's increasing focus on privacy, both as a selling point and as a guiding principle. Don't be surprised if future iOS devices (and likely Macs) become tougher to crack, even for experts who know the platform inside out.