TITLE:
Encrypted CDMA Audio Network
AUTHORS:
Alfredo A. Ortega, Víctor A. Bettachini, Pablo I. Fierens, José Ignacio Alvarez-Hamelin
KEYWORDS:
Non-Audible Communication, Ad-Hoc Network, Security
JOURNAL NAME:
Journal of Information Security,
Vol.5 No.3,
June
25,
2014
ABSTRACT: We present a secure LAN
using sound as the physical layer for low speed applications. In particular, we
show a real implementation of a point-to-point or point-to-multipoint secure
acoustic network, having a short range, consuming a negligible amount of power,
and requiring no specific hardware on mobile clients. The present acoustic
network provides VPN-like private channels to multiple users sharing the same
medium. It is based on Time-hopping CDMA, and makes use of an encrypted Bloom
filter. An asymmetrical error-correction is used to supply data integrity, even
in the presence of strong interference. Simulations and real experiments show
its feasibility. We also provide some theoretical analysis on the principle of
operation.