Impact of mobility on trust decay rate

In trust-based models for MANETs, it is often assumed that the trust value between two nodes decays proportional to the time these nodes are out of transmission range of each other. We present in this paper an analysis of the trust decay rate for some general networking and trust computation models. Our analysis allows for the consideration of the subjective trust values assigned by present and past neighbours within a given history timeframe. The mobility models being studied in this paper include random way point (RWP) and random walk (RW). This analysis exhibits the impact of mobility on the trust decay rate. Simulations are used to confirm the accuracy of analytical results and shed light on some interesting facts such as the slow decay of globally computed trust values, even if fast subjective trust decay functions (linear and exponential) are employed, or the weak impact of the network density on the trust decay rate.

[1]  Jerzy Konorski,et al.  Data-Centric Dempster-Shafer Theory-Based Selfishness Thwarting via Trust Evaluation in MANETs and WSNs , 2009, 2009 3rd International Conference on New Technologies, Mobility and Security.

[2]  Vladimiro Sassone,et al.  An analysis of the exponential decay principle in probabilistic trust models , 2009, Theor. Comput. Sci..

[3]  Jie Wu,et al.  Uncertainty Modeling and Reduction in MANETs , 2010, IEEE Transactions on Mobile Computing.

[4]  Meng Wu,et al.  A Trust Approach for Node Cooperation in MANET , 2007, MSN.

[5]  John S. Baras,et al.  On Trust Establishment in Mobile Ad-Hoc Networks , 2002, Security Protocols Workshop.

[6]  William A. Arbaugh,et al.  Bootstrapping security associations for routing in mobile ad-hoc networks , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[7]  Louise Lamont,et al.  Using Cryptography in Trust Computing for Networked Communications , 2011 .

[8]  M. Chandrasekaran,et al.  Quantifying trust in mobile ad-hoc networks , 2005, International Conference on Integration of Knowledge Intensive Multi-Agent Systems, 2005..

[9]  G ShilpaS.  A Trust Model for Secure and QoS Routing in MANETS , 2011 .

[10]  Ming Li,et al.  Supporting periodic, strong re-authentication in MANET scenarios , 2010, 2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE.

[11]  Ming Li,et al.  A modular security architecture for managing security associations in MANETs , 2010, The 7th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (IEEE MASS 2010).

[12]  Brian L. Mark,et al.  A quantitative trust establishment framework for reliable data packet delivery in MANETs , 2005, SASN '05.

[13]  Tracy Camp,et al.  A survey of mobility models for ad hoc network research , 2002, Wirel. Commun. Mob. Comput..

[14]  B. B. Amberker,et al.  A Trust Model for Secure and QoS Routing in MANETS , 2011 .