February 1, 2012
      
                  
        
  Author(s)
  Angelos  Stavrou,   Jeff  Voas,   Tom T. Karygiannis,   Stephen  Quirolgico
 
       
            
    
    
        Recent advancements in hardware have increased the computing power, memory, storage, and wireless connectivity of handheld mobile devices. Smart-phone devices are used for everyday activities that range from Maps and Geo-location tagging to banking. Indeed