Fast and scalable secret key generation exploiting channel phase randomness in wireless networks

—Recently, there has been great interest in physical layer security techniques that exploit the randomness of wireless channels for securely extracting cryptographic keys. Several interesting approaches have been developed and demonstrated for their feasibility. The state-of-the-art along this research direction, however, still has much room for improving the practicality of the solution. This is because i) the key bit generation rate supported by most existing approaches is very low which significantly limits their practical usage given the intermittent connectivity in mobile environments; ii) existing approaches suffer from the scalability and flexibility issues, i.e., they cannot be directly extended to establish a group key for node groups of size larger than two and do not suit for static environments. With these observations in mind, we present a new secret key generation approach that utilizes the uniformly distributed phase information of channel responses to extract shared...

• Type: Journal
• Year: 2011
• Where: INFOCOM
• Authors: Qian Wang, Hai Su, Kui Ren, Kwangjo Kim
• Keywords: Communications, INFOCOM 2011, Intermittent Connectivity, Mobile Environments, Static Environments