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The article discusses research into smartphones with special emphasis on security and privacy, focusing on the Blackphone developed by cryptologist Phil Zimmerman of the encryption company Silent Circle. Topics include the growing public awareness of data security through media coverage of events such as political protests and data collection of the U.S. National Security Agency, Zimmerman's background, career, and the evolution of encryption technologies, and the design and function of the Blackphone using a modified Android operating system called PrivatOS and built by phone company Geeksphone.Mobile computing is human–computer interaction by which a computer is expected to be transported during normal usage. Mobile computing involves mobile communication, mobile hardware, and mobile software. Communication issues include ad hoc and infrastructure networks as well as communication properties, protocols, data formats and concrete technologies. Hardware includes mobile devices or device components. Mobile software deals with the characteristics and requirements of mobile applications.