Defense Against Primary User Emulation Attacks in Cognitive Radio Networks Using Advanced Encryption Standard
Defense Against Primary User Emulation Attacks in Cognitive Radio Networks Using Advanced Encryption Standard
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DOI：
10.1109/tifs.2014.2310355
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发表时间：
2014-05
影响因子：
6.8
通讯作者：
A. Alahmadi;Mai Abdelhakim;Jian Ren;Tongtong Li
中科院分区：
文献类型：
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作者：
A. Alahmadi;Mai Abdelhakim;Jian Ren;Tongtong Li
本文考虑了在数字电视 (DTV) 频段的空白空间中运行的认知无线电网络中的主要用户模拟攻击。我们提出了一种可靠的 AES 辅助 DTV 方案，其中在电视发射机处生成 AES 加密参考信号并用作 DTV 数据帧的同步位。通过允许发射机和接收机之间共享秘密，参考信号可以在接收机处重新生成并用于实现授权主用户的准确识别。另外，结合对接收信号的自相关性分析，无论主用户是否存在，都可以准确地检测出恶意用户的存在。我们通过理论分析和模拟示例来分析所提出方法的有效性。结果表明，利用 AES 辅助的 DTV 方案，在主用户模拟攻击下可以高精度地检测到主用户以及恶意用户。应该强调的是，除了插入式AES芯片之外，所提出的方案不需要改变硬件或系统结构。它有可能在主要用户模拟攻击下直接应用于当今的 DTV 系统，以实现更有效的频谱共享。
This paper considers primary user emulation attacks in cognitive radio networks operating in the white spaces of the digital TV (DTV) band. We propose a reliable AES-assisted DTV scheme, in which an AES-encrypted reference signal is generated at the TV transmitter and used as the sync bits of the DTV data frames. By allowing a shared secret between the transmitter and the receiver, the reference signal can be regenerated at the receiver and used to achieve accurate identification of the authorized primary users. In addition, when combined with the analysis on the autocorrelation of the received signal, the presence of the malicious user can be detected accurately whether or not the primary user is present. We analyze the effectiveness of the proposed approach through both theoretical analysis and simulation examples. It is shown that with the AES-assisted DTV scheme, the primary user, as well as malicious user, can be detected with high accuracy under primary user emulation attacks. It should be emphasized that the proposed scheme requires no changes in hardware or system structure except for a plug-in AES chip. Potentially, it can be applied directly to today's DTV system under primary user emulation attacks for more efficient spectrum sharing.