Authors:
Amir I. Sulimov
;
Alexey D. Smolyakov
;
Arkadij V. Karpov
and
Oleg N. Sherstyukov
Affiliation:
Kazan Federal University, Russian Federation
Keyword(s):
Encryption Keys Distribution, Common Randomness, Multipath Radio Propagation, Channel Reciprocity, Randomness of Carrier Phase, Rate of Encryption Key Distribution, Spatial Correlation, Key Interception.
Related
Ontology
Subjects/Areas/Topics:
Applied Cryptography
;
Cryptographic Techniques and Key Management
;
Data Engineering
;
Databases and Data Security
;
Information and Systems Security
;
Network Security
;
Wireless Network Security
Abstract:
The paper presents the results of experimental distribution of encryption keys based on random carrier phase of fading radio signal measured in a multipath environment. The random bits extraction scheme was proposed and tested in practice. The proposed scheme is universal and applicable to measurements digitizing of any observable random variable. Experimental study of spatial correlation of multipath signal phase in the case of transverse spatial diversity is carried out. Experimental estimation of the key generation rate and the probability of its passive interception at different distances between the legal user and potential eavesdropper are also performed. It is shown that the parameters of bit extraction procedure significantly affect on the performance and security of the key distribution process.