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In this paper, we consider scenarios where traditional methods of sensor deployment do not perform well with regard to intrusion detection at the boundary of an area under protection. We propose a Hybrid Gaussian-Ring Deployment that provides a higher intrusion detection probability with fewer nodes for attacks at the edge of the network. This reduces the distance, that an external intruder can traverse before being detected. We provide the network deployment parameters to suit the desired level of security for a given Wireless Sensor Network application.