The need for more efficient spectrum utilization is becoming more pronounced in our increasingly digitalized society. However, this also introduces a variety of new security threats. In this paper, we introduce a novel cognitive user emulation attack (CUEA) in a cognitive radio network (CRN), which can be exploited by intruders during spectrum handoff. Then, we propose a secure handoff mechanism that can successfully counter such an attack by introducing a coordinating cognitive user that computes the level of trust of each cognitive user based on its behavioral characteristics. Malicious users can be effectively identified by the coordinating cognitive user by looking up the trust values. The performance of the proposed mechanism is validated using MATLAB simulations. The simulation results show that the utility of the proposed mechanism in terms of its probability in correctly identifying false authentication, detection rate, throughput rate, and transmission delay.

中文翻译：

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认知无线电网络中的安全频谱切换机制

在我们日益数字化的社会中，对更有效频谱利用的需求变得越来越明显。但是，这也引入了各种新的安全威胁。在本文中，我们在认知无线电网络 (CRN) 中引入了一种新颖的认知用户仿真攻击 (CUEA)，它可以在频谱切换期间被入侵者利用。然后，我们提出了一种安全切换机制，可以通过引入协调认知用户来成功应对这种攻击，该用户根据其行为特征计算每个认知用户的信任级别。协调认知用户可以通过查找信任值来有效识别恶意用户。使用 MATLAB 仿真验证了所提出机制的性能。