Explore the security internals of Windows Phone 7 in this 44-minute Black Hat USA 2012 conference talk. Delve into the comprehensive reverse engineering analysis that uncovered the veiled security models of this modern mobile operating system. Learn about the sandbox and secure application model based on Windows CE 6, and discover how these protective measures can potentially be breached on some Windows Phone 7.5 devices. Examine the system's security strengths and weaknesses through practical examples. Investigate the impact of third-party vendor customizations on system security, including special interfaces that may introduce vulnerabilities such as directory traversal and improper privileged operations. Gain insights into potential exploitation techniques and countermeasures for securing Windows Phone 7 devices.