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In a move that will fashion Windows Phone a better option for enterprise users, Windows Phone 8 will incorporate full device encryption, based on the same technology as desktop Windows' BitLocker encryption. Apollo will exhibit richer support for Exchange ActiveSync policies, and Systems Center inventorying and manipulation. There will also be greater support for private deployment of custom line-of-traffic applications.
Under the hood, the operating system will be built on the same foundation as Windows 8. Belfiore mentions that the quiddity, networking stacks, security subsystems, and multimedia support will heavily imbricate between the two.
The Web browser, too, will be in common, with Internet Explorer 10 making its way to the phone. Microsoft also plans to come after in Amazon and Opera's footsteps, using server-side compression and proxying to decrease the amount of data needed to load webpages by a claimed 30 percent.
Full compatibility with popular Windows Phone applications—expected to number 100,000 by the beat Windows Phone 8 is launched—is assured, and there will be added stand for native code development in addition to the current Silverlight-based example. Belfiore promises that "most" code will be portable between the desktop and the phone. We would demand this to mean that Metro-style applications written using Windows 8's WinRT will be without delay portable.
Source: Ars Technica