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SOWMYA RAMAPATRUNI is an academic who published a paper in 2019 entitled Anomaly Detection Models for Smart Home Security. SOWMYA RAMAPATRUNI published this work as part of a team: Ramapatruni, Sowmya. Here is a description of this work: Recent years have seen significant growth in adoption of smart homes devices. These devices provide convenience and energy efficiency to users. Some are even targeted at the physical security of the home. For example, smart security cameras can detect unauthorized movements and smoke or heat sensors can detect potential fire accidents. However, as many recent examples have shown, this opens up a new cyber threat surface. There have been several recent examples of smart devices being hacked for nuisance or privacy violations, and also being used as bots in DDoS attacks. This work explores the detecting when a smart home has been cyber attacked. We explore the application of big data and machine learning to identify anomalous activities that can occur in a smart home environment. A Hidden Markov Model (HMM) is trained on network level sensor data, created from a test b.