Abstract

Wireless communications between two devices can be protected by secret keys. However, existing key generation schemes suffer from the high bit disagreement rate and low bit generation rate. In this paper, we propose an efficient physical layer key generation scheme by exploring the Received Signal Strength (RSS) of signals. In order to reduce the high mismatch rate of the measurements and to increase the key generation rate, a pair of transmitter and receiver separately apply adaptive quantization algorithm for quantifying the measurements. Then, we implement a randomness extractor to further increase key generation rate and ensure randomness of generated of keys. Several real-world experiments are implemented to verify the effectiveness of the proposed scheme. The results show that compared with the other related schemes, our scheme performs better in bit generation rate, bit disagreement rate, and randomness.

中文翻译：

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无线通信中的高效物理层密钥生成技术

摘要

两个设备之间的无线通信可以通过密钥保护。然而，现有的密钥生成方案遭受高比特不一致率和低比特生成率的困扰。在本文中，我们通过探索信号的接收信号强度（RSS）提出了一种有效的物理层密钥生成方案。为了减少测量的高失配率并增加密钥生成率，一对发送器和接收器分别应用自适应量化算法来量化测量。然后，我们实现一个随机性提取器，以进一步提高密钥生成率，并确保密钥生成的随机性。进行了一些实际实验，以验证所提出方案的有效性。结果表明，与其他相关方案相比，