air 9irmware updates. As a result, the iPhone security solution fails at the 9irst line of de�,fense, which is device level security. Vulnerabilities, such as using the emergency call ,feature to gain access to the home deck, are still being discovered. It also relies on third�,party vendors to supply security at other levels such as VPNs. Overall enterprises should ,proceed with caution and limit the use of iPhones, especially for sensitive data.,Microsoft’s Windows Mobile,Microsoft’s security solution includes the Windows Mobile OS, System Center Mobile ,Device Manager (MDM) 2008, the MDM Gateway server and the MDM client application ,(only available on Windows Mobile 6.1 or later) that lets you manage the device through ,MDM. Microsoft doesn’t build its own devices. All access to the company intranet is ,through the MDM Gateway Server that sits between the 9irewalls in the DMZ (see Figure ,3). The MDM Gateway Server is a stand�alone server, not domain�joined, which authenti�,cates incoming connection requests by verifying that it was signed by a particular root ,certi9icate. Once a Windows Mobile device has been authenticated using the Active Di�,rectory Domain Service it can connect to MDM Gateway Server. Microsoft uses a mutu�,ally authenticated SSL connection between the MDM Device Management Server and the ,MDM Gateway Server to protect against unauthorized network access,
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