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Trust is an important concept in human interactions which facilitates the formation and continued existence of functional human societies. The radio frequency spectrum is a limited natural resource and hence its efficient use is of the greatest importance. Cognitive radio is a smart wireless communication system that is conscious of its surrounding environment, learns from the environment and adapts its internal states by making corresponding changes in certain operating parameters in real time. In this paper, the authors search the adaptive characteristics of cognitive radio in secure and reliable communication. But how a communication system can be made reliable such that there occur no eavesdropping and information leakage.
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