An incentive compatible reputation mechanism for ubiquitous computing environments |
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Authors: | Jinshan Liu Valérie Issarny |
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Affiliation: | (1) INRIA-Rocquencourt, Domaine de Voluceau, Rocquencourt, BP 105, 78153 Le chesnay Cedex, France;(2) Present address: Expway, 23 rue Louis Le Grand, 75002 Paris, France |
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Abstract: | The vision of ubiquitous computing is becoming a reality thanks to the advent of portable devices and the advances in wireless networking technologies. It aims
to facilitate user tasks through seamless utilization of services available in the surrounding environments. In such distributed
environments featuring openness, interactions such as service provision and consumption between entities that are unknown
or barely known to each other, are commonplace. Trust management through reputation mechanism for facilitating such interactions
is recognized as an important element of ubiquitous computing. It is, however, faced by the problems of how to stimulate reputation
information sharing and enforce honest recommendation elicitation. We present in this paper an incentive compatible reputation
mechanism to facilitate the trustworthiness evaluation of entities in ubiquitous computing environments. It is based on probability
theory and supports reputation evolution and propagation. Our reputation mechanism not only shows robustness against lies,
but also stimulates honest and active recommendations. The latter is realized by ensuring that active and honest recommenders,
compared to inactive or dishonest ones, can obtain the most number of honest (helpful) recommendations and thus suffer the
least number of wrong trust decisions, as validated by simulation based evaluation. The proposed reputation mechanism is also
implemented as part of a QoS-aware Web service discovery middleware and evaluated regarding its overhead on service discovery
latency. |
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Keywords: | Reputation mechanism Incentive compatibility Mobile ad hoc networks Ubiquitous computing |
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