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High security and low energy consumption are two of the most important features in implementing today's wireless network systems and applications. They are not totally unrelated in terms of system design. In fact, there is a tradeoff relationship between security and energy. Generally the more secure a system is, the more energy it consumes. In this paper, we integrate a confidentiality (security) enhancement technique with an energy-saving scheme together, and analyze its power consumption. The multipath data allocation improves confidentiality, and the interference-aware minimum energy routing preserves transmission power. Based on our investigation, low density wireless networks can provide both enhanced security and reduced energy consumption at a reasonable level.