Authors:
            
                    Tiago Antonio
                    
                        
                    
                     and
                
                    Sergio Donizetti Zorzo
                    
                        
                    
                    
                
        
        
            Affiliation:
            
                    
                        
                    
                    Federal University of São Carlos, Brazil
                
        
        
        
        
        
             Keyword(s):
            Privacy, Mobile Social Networks, Rules of Privacy, Location-sharing.
        
        
            
                Related
                    Ontology
                    Subjects/Areas/Topics:
                
                        Enterprise Information Systems
                    ; 
                        Human Factors
                    ; 
                        Human-Computer Interaction
                    ; 
                        Physiological Computing Systems
                    
            
        
        
            
                Abstract: 
                Mobile social networks allow users to access, publish, and share information with friends, family, or groups of friends by using mobile devices. Location is one kind of information frequently shared. By using location-sharing on a social network, users allow service providers to register this information and use it to offer products and services based on the geographic area. Many users consider offers a personal gain, but for others, it causes concerns with security and privacy. These concerns can eliminate the use of mobile social networks. This paper presents a model of a mobile social network with a privacy guarantee. The model enables the user to set rules determining when, where, and with whom (friends or a group of friends) location information will be shared. Moreover, the model provides levels of privacy with anonymity techniques which hide the user’s high-accuracy current location before it is shared. To validate the model, a mobile social network prototype, MSNPrivacy (Mobi
                le Social Network with Privacy), was developed for Android. Tests were carried out aiming to measure MSNPrivacy’s performance. The results verify that the rules and privacy levels in place provide an acceptable delay, and the model can be applied in real applications.
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