Methodologies of Secret-Key Agreement Using Wireless Channel Characteristics

Syed Taha Ali and Vijay Sivaraman

Mirko Bottarelli, Gregory Epiphaniou, Dhouha Kbaier Ben Ismail +2 more

Takayuki Shimizu, Hisato Iwai, Hideichi Sasaoka

Syed Taha Ali, Vijay Sivaraman

In this article, we give an overview of current research on shared secret-key agreement between two parties. This agree⁃ ment is based on radio wireless channel characteristics. We discuss the advantages of this approach over traditional cryp⁃ tographic mechanisms and present the theoretical background of this approach. We then give a detailed description of the key-agreement process and the threat model, and we summarize the typical performance metrics for shared se⁃ cret-key agreement. There are four processes in shared secret-key agreement: sampling, quantization, information recon⁃ ciliation, and privacy amplification. We classify prior and current research in this area according to innovation on these four processes. We conclude with a discussion of existing challenges and directions for future work.

崇之 清水

Huiyun Li, Qi Zhang, Hai Yuan

Numerous research efforts have been made recently on exploiting the randomness of wireless channels to generate secret keys. This channel state information (CSI) based key generation method relies on spatial independence between the legitimate and eavesdropping channels. In this paper, we propose a methodology to extract secret keys through side-channel information. Our methodology involves the capture of side-channel information leaked by the electronic instruments, either when measuring channel characteristics or during encryption/decryption for key confirmation. Secret keys are extracted via analysis of the side-channel information. We provide experiment results to demonstrate the feasibility of our proposed side-channel attack methodology.