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An effective defensive node against jamming attacks in sensor networks

机译：一个有效的防御节点，可抵御传感器网络中的干扰攻击

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摘要

Jamming is defined as the act of intentionally directing electromagnetic energy towards a communication system to disrupt or prevent signal transmission. In the context of wireless sensor networks (WSNs), jamming is the type of attack which interferes with the radio frequencies used by sensor nodes and may be viewed as a special case of denial of service (DoS) attacks. Herein, we outline the possible jamming attacks a WSN may encounter. The main contribution of this paper is the outline of the design specifications of a prototype node 'Ares' that effectively defends jamming attacks. Our focus is on frequency hopping spread spectrum (FHSS) and direct sequence spread spectrum (DSSS), two of the most effective countermeasures against jamming. The main novel aspect of Ares is that it uses a hybrid FHSS-DSSS approach to defend jamming attacks. We suggest the use of a specific FHSS technique in 5 GHz band with 51 frequency channels wherein the channel sequence is generated using a key (which derives from a secret word), known only to the sink and the sensor nodes, as a seed. Each channel uses DSSS modulation with 16-bit pseudo noise (PN) code. The PN code derives from the same key used for FHSS channel generation. The pre-eminence of our method against alternative anti-jamming techniques is demonstrated through extensive simulation tests.
机译：干扰被定义为故意将电磁能引导至通信系统以破坏或阻止信号传输的行为。在无线传感器网络（WSN）的上下文中，干扰是一种攻击类型，它会干扰传感器节点使用的射频，并且可以被视为拒绝服务（DoS）攻击的特殊情况。在此，我们概述了WSN可能遇到的干扰攻击。本文的主要贡献是可有效防御干扰攻击的原型节点“ Ares”的设计规范概述。我们的重点是跳频扩频（FHSS）和直接序列扩频（DSSS），这是两种最有效的抗干扰措施。 Ares的主要新颖之处在于，它使用混合FHSS-DSSS方法来防御干扰攻击。我们建议在具有51个频道的5 GHz频带中使用特定的FHSS技术，其中使用仅对接收器和传感器节点已知的密钥（从秘密字中得出）来生成信道序列作为种子。每个通道使用带有16位伪噪声（PN）码的DSSS调制。 PN码源自用于FHSS信道生成的同一密钥。通过广泛的模拟测试证明了我们的方法相对于其他抗干扰技术的优越性。

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