%0 Journal Article
%T Case Studies of Attacks over Adaptive Modulation Based Tactical Software Defined Radios
%A David Fernandes Cruz Moura
%A Fabricio Alves Barbosa da Silva
%A Juraci Ferreira Galdino
%J Journal of Computer Networks and Communications
%D 2012
%I Hindawi Publishing Corporation
%R 10.1155/2012/703642
%X This paper presents case studies of attacks aimed at tactical software defined radios based on a classification with the most common sources of vulnerabilities, classes of attacks, and types of intrusions that military radio sets may suffer. Besides that, we also describe how attack mitigation strategies can impact the development of SDR infrastructures. By using such approach, we identify several possible sources of vulnerabilities, attacks, intrusions, and mitigation strategies, illustrating them onto typical tactical radio network deployment scenarios, as an initial and necessary step for the definition of realistic and relevant security requirements for military software defined radio applications. 1. Introduction In the past, military radio design was totally focused on dedicated electronic components. Afterwards, we have witnessed the appearance of software configurable radios (SCR), in which users have the opportunity to choose the most appropriate waveforms for different combat scenarios. In recent years, though, the development of radio communication technology solutions has been submitted to a huge paradigm change¡ªthe software defined radio (SDR) technology upspring, in which previously hardware-based features became software defined and users may also introduce new application waveforms on the fly. Such progress is due to several enhancements in different areas like embedded systems, analog-to-digital converters, digital transmission, digital signal processing, multiband antennas, software architectures, and especially in novel General-Purpose Processors (GPP) evaluation capacity. Based on that, SDR foreshadows important consequences and advantages for the development of wireless solutions for military communications systems. Among the envisioned features, we can list interoperability, waveform portability, and the possibility to be updated with the most recent advances in radio communications without hardware replacement requirements. Moreover, SDR is envisioned as the most appropriate platform for cognitive radio development. At a glance, the high level functional model of an SDR consists of a front end RF subsystem which performs channel selection, downconversion to baseband, and data forwarding onto a software-based processing unit, where the associated digital bitstream is submitted onto appropriate layers (e.g., data link, network, and security modules) to perform suitable decoding tasks to extract the desired information. This process is reversed on the transmit side, where the input signal is coded and a modulated signal bearing the
%U http://www.hindawi.com/journals/jcnc/2012/703642/