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

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 a...

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Bibliographic Details
Main Authors: Margelis, George, Fafoutis, Xenofon, Oikonomou, George, Piechocki, Robert, Tryfonas, Theo, Thomas, Paul
Format: Conference Proceeding
Language:English
Subjects:
Coherence
Cryptography
Discrete cosine transforms
Entropy
Internet of Things
Transceivers
Online Access:Request full text
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Summary: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.
ISSN:1938-1883
DOI:10.1109/ICC.2017.7997419