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The security in Wireless Sensor Networks (WSNs) is a critical issue due to the inherent limitations of computational capacity and power usage. While a variety of security techniques are being developed and a lot of research is going on in security field at a brisk pace but the field lacks a common integrated platform which provides a comprehensive comparison of the seemingly unconnected but linked issues. In this paper, the authors attempt to comparatively analyze the various available security approaches highlighting their advantages and weaknesses. This will surely ease the implementers' burden of choosing between various available modes of defence.
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