Abstract
Security in wireless sensor networks (WSNs) demands efficient key management schemes. In particular, one of the main research challenges is to ensure secure key storage by sensors due to their constrained resources and high exposure to tampering attempts. To address this issue, we have proposed SENSORLock, a secure key storage mechanism which can be applied to different key distribution architectures for WSNs. In this work, we evaluate SENSORLock through different study cases considering three key distribution architectures: TinySec, SPINS, and NCD. Our goal is to demonstrate its feasibility in large-scale sensor networks. Simulation results indicate that our mechanism introduces an average overhead of 1.9% in terms of end to end delay and provides a similar estimated power consumption compared to the aforementioned architectures. Hence, we argue that it is feasible to use SENSORLock (i) in large-scale sensor networks and (ii) under different key distribution schemes.
Highlights
Wireless sensor networks (WSNs) are a particular case of mobile ad hoc networks (MANETs)
We focused on secure symmetric keys storage supported by a cryptographic module (CM) responsible for holding a secret Z used to encrypt all system keys and data stored within the sensor’s flash memory
To solve the stored keys exposed problem observed in TinySec architecture and increase its robustness, we propose the application of SENSORLock in its context
Summary
Wireless sensor networks (WSNs) are a particular case of mobile ad hoc networks (MANETs). Sensor networks are composed of tiny nodes that collect data from the environment in which they are deployed, sending data through multiple hops toward sink nodes. These networks are applied with several purposes from weather forecasting to assisted living, contributing to the pervasive computing [1, 2]. Key management in WSNs certainly drives many issues. Key storage is a challenging issue in sensor networks which still demands suitable solutions [3,4,5]
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