Abstract
In smart cities, Advanced Metering Infrastructure (AMI) is an integral part of utility service which allows automated metering, control and monitoring. Since AMI employs a wireless network for communication, data privacy becomes a burning issue. The attacker can decode the smart meter consumption data, various control commands of components of the smart grid, infuse false command and may even take over the system. Since a smart meter has limited memory and computational capability, we need a light but robust security scheme. In this paper, we propose a location based encryption method where the source node encrypts the data with a key that is associated with its own coordinate points, the destination node receives this data and decrypts it with the key. Since GPS doesn't work inside the multi-stored and in some geographical location like forests, hilly place etc., we propose the localization of source nodes (meters) by Received Signal Strength (RSS) using Maximum Likelihood Estimator (MLE). Finally the strength of security of a data packet is analyzed.
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