Paper Info
Title
On non-cooperative location privacy: a game-theoretic analysis
Abstract
In mobile networks, authentication is a required primitive for the majority of security protocols. However, an adversary can track the location of mobile nodes by monitoring pseudonyms used for authentication. A frequently proposed solution to protect location privacy suggests that mobile nodes collectively change their pseudonyms in regions called mix zones. Because this approach is costly, self-interested mobile nodes might decide not to cooperate and could thus jeopardize the achievable location privacy. In this paper, we analyze the non-cooperative behavior of mobile nodes by using a game-theoretic model, where each player aims at maximizing its location privacy at a minimum cost. We first analyze the Nash equilibria in n-player complete information games. Because mobile nodes in a privacy-sensitive system do not know their opponents' payoffs, we then consider incomplete information games. We establish that symmetric Bayesian-Nash equilibria exist with simple threshold strategies in n-player games and derive the equilibrium strategies. By means of numerical results, we show that mobile nodes become selfish when the cost of changing pseudonyms is small, whereas they cooperate more when the cost of changing pseudonyms increases. Finally, we design a protocol - the PseudoGame protocol - based on the results of our analysis.
Year
DOI
Venue
2009
10.1145/1653662.1653702
ACM Conference on Computer and Communications Security
Keywords
Field
DocType
mobile network,incomplete information game,location privacy,mobile node,n-player complete information game,pseudonyms increase,game-theoretic analysis,non-cooperative location privacy,pseudogame protocol,self-interested mobile node,minimum cost,achievable location privacy,security,game theory,design,nash equilibria,security protocol,economics
Internet privacy,Authentication,Cryptographic protocol,Computer security,Computer science,Game theoretic,Game theory,Adversary,Nash equilibrium,Complete information
Conference
Citations 
PageRank 
References 
74
2.86
40
Authors
4
Name
Order
Citations
PageRank
Julien Freudiger146523.49
Mohammad Hossein Manshaei278653.69
J. -P. Hubaux310006772.23
David C. Parkes43293342.69