Title: Detecting Arbitrary Attacks Using Continuous Secured Side Information in Wireless Networks,
Abstract: This paper focuses on Byzantine attack detection for Gaussian two-hop one-way
relay network, where an amplify-and-forward relay may conduct Byzantine attacks
by forwarding altered symbols to the destination. For facilitating attack
detection, we utilize the openness of wireless medium to make the destination
observe some secured signals that are not attacked. Then, a detection scheme is
developed for the destination by using its secured observations to
statistically check other observations from the relay. On the other hand,
notice the Gaussian channel is continuous, which allows the possible Byzantine
attacks to be conducted within continuous alphabet(s). The existing work on
discrete channel is not applicable for investigating the performance of the
proposed scheme. The main contribution of this paper is to prove that if and
only if the wireless relay network satisfies a non-manipulable channel
condition, the proposed detection scheme achieves asymptotic errorless
performance against arbitrary attacks that allow the stochastic distributions
of altered symbols to vary arbitrarily and depend on each other. No pre-shared
secret or secret transmission is needed for the detection. Furthermore, we also
prove that the relay network is non-manipulable as long as all channel
coefficients are non-zero, which is not essential restrict for many practical
systems.