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Physical layer secret-key generation with discreet cosine transform for the Internet of Things

机译：物联网的具有离散余弦变换的物理层密钥生成

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The confidentiality of communications in the Internet of Things (IoT) is critical, with cryptography currently being the most widely employed method of ensuring it. Establishing cryptographically secure communication links between two transceivers requires the pre-agreement on some key, unknown to an external attacker. In recent years there has been growing attention in techniques that generate a shared random key through observation of the channel and its effects on the exchanged messages. In this work we present SKYGlow, a novel scheme for secret-key generation, designed for IoT devices, such as IEEE 802.15.4 and Bluetooth Low Energy (BLE) transceivers. SKYGlow employs the Discreet Cosine Transform (DCT) of channel observations and Slepian-Wolf coding for information reconciliation. Real-life experiments have resulted in the creation of 128-bit secret keys with only 65 packet exchanges and with an entropy of 0.9978 bits, making our scheme much more energy-efficient compared with others in the existing literature.
机译：物联网（IoT）中通信的机密性至关重要，目前，加密是确保其安全性的最广泛使用的方法。在两个收发器之间建立加密安全的通信链路，需要预先达成对外部攻击者未知的某些密钥的协议。近年来，人们越来越关注通过观察通道及其对交换消息的影响来生成共享随机密钥的技术。在这项工作中，我们介绍SKYGlow，这是一种用于密钥生成的新颖方案，专为IoT设备（例如IEEE 802.15.4和低功耗蓝牙（BLE）收发器）设计。 SKYGlow使用通道观测的离散余弦变换（DCT）和Slepian-Wolf编码进行信息协调。现实生活中的实验导致创建了仅具有65个数据包交换且具有0.9978位熵的128位秘密密钥，这使我们的方案与现有文献中的其他方案相比，具有更高的能源效率。

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