Authors:
Antonio Vincenzo Taddeo
;
Marcello Mura
and
Alberto Ferrante
Affiliation:
University of Lugano, Switzerland
Keyword(s):
Security, priority, Wireless sensor networks, Quality of services, Energy harvesting.
Related
Ontology
Subjects/Areas/Topics:
Cloud Computing
;
Data and Systems Security
;
Information and Systems Security
;
Network Security
;
Sensor and Mobile Ad Hoc Network Security
;
Service and Systems Design and Qos Network Security
;
Services Science
;
Wireless Network Security
Abstract:
Wireless sensor networks are composed of small nodes that might be used for a variety of purposes. Nodes communicate together through a wireless connection that might be subject to different attacks when the network is placed in hostile environments. Furthermore, the nodes are usually equipped with very small batteries providing limited battery life, therefore limited power consumption is of utmost importance for nodes. This is in clear opposition with the requirement of providing security to communications as security might be very expensive from the power consumption stand point. Energy harvesting methods can be used to recharge batteries, but, in most of the cases the recharge profile cannot be known in advance. Therefore, nodes might face
periods of time in which no recharge is available and the battery level is low.
In this paper we introduce an optimization mechanism that allows the system to change the communication security settings at runtime with the goal of improving no
de lifetime, yet providing a suitable security level. The optimization mechanism further improves energy consumption by putting in place a quality of service mechanism: when energy is scarce, the system tends to send only essential packets. As shown by the simulations presented in this paper, this mechanism optimizes the energy consumption among different recharges.
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