2,536 research outputs found
An Adversarial Interpretation of Information-Theoretic Bounded Rationality
Recently, there has been a growing interest in modeling planning with
information constraints. Accordingly, an agent maximizes a regularized expected
utility known as the free energy, where the regularizer is given by the
information divergence from a prior to a posterior policy. While this approach
can be justified in various ways, including from statistical mechanics and
information theory, it is still unclear how it relates to decision-making
against adversarial environments. This connection has previously been suggested
in work relating the free energy to risk-sensitive control and to extensive
form games. Here, we show that a single-agent free energy optimization is
equivalent to a game between the agent and an imaginary adversary. The
adversary can, by paying an exponential penalty, generate costs that diminish
the decision maker's payoffs. It turns out that the optimal strategy of the
adversary consists in choosing costs so as to render the decision maker
indifferent among its choices, which is a definining property of a Nash
equilibrium, thus tightening the connection between free energy optimization
and game theory.Comment: 7 pages, 4 figures. Proceedings of AAAI-1
Universal Adversarial Perturbations for Speech Recognition Systems
In this work, we demonstrate the existence of universal adversarial audio
perturbations that cause mis-transcription of audio signals by automatic speech
recognition (ASR) systems. We propose an algorithm to find a single
quasi-imperceptible perturbation, which when added to any arbitrary speech
signal, will most likely fool the victim speech recognition model. Our
experiments demonstrate the application of our proposed technique by crafting
audio-agnostic universal perturbations for the state-of-the-art ASR system --
Mozilla DeepSpeech. Additionally, we show that such perturbations generalize to
a significant extent across models that are not available during training, by
performing a transferability test on a WaveNet based ASR system.Comment: Published as a conference paper at INTERSPEECH 201
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