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Authors: Mary K. Bispham ; Ioannis Agrafiotis and Michael Goldsmith

Affiliation: Department of Computer Science, University of Oxford and U.K.

Keyword(s): Voice-controlled Digital Assistant, Human-computer Interaction, Cyber Security.

Abstract: This paper presents novel attacks on voice-controlled digital assistants using nonsensical word sequences. We present the results of a small-scale experiment which demonstrates that it is possible for malicious actors to gain covert access to a voice-controlled system by hiding commands in apparently nonsensical sounds of which the meaning is opaque to humans. Several instances of nonsensical word sequences were identified which triggered a target command in a voice-controlled digital assistant, but which were incomprehensible to humans, as shown in tests with human experimental subjects. Our work confirms the potential for hiding malicious voice commands to voice-controlled digital assistants or other speech-controlled devices in speech sounds which are perceived by humans as nonsensical. This paper also develops a novel attack concept which involves gaining unauthorised access to a voice-controlled system using apparently unrelated utterances. We present the results of a proof-of-c oncept study showing that it is possible to trigger actions in a voice-controlled digital assistant using utterances which are accepted by the system as a target command despite having a different meaning to the command in terms of human understanding. (More)

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Paper citation in several formats:
Bispham, M.; Agrafiotis, I. and Goldsmith, M. (2019). Nonsense Attacks on Google Assistant and Missense Attacks on Amazon Alexa. In Proceedings of the 5th International Conference on Information Systems Security and Privacy - ICISSP; ISBN 978-989-758-359-9; ISSN 2184-4356, SciTePress, pages 75-87. DOI: 10.5220/0007309500750087

@conference{icissp19,
author={Mary K. Bispham. and Ioannis Agrafiotis. and Michael Goldsmith.},
title={Nonsense Attacks on Google Assistant and Missense Attacks on Amazon Alexa},
booktitle={Proceedings of the 5th International Conference on Information Systems Security and Privacy - ICISSP},
year={2019},
pages={75-87},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007309500750087},
isbn={978-989-758-359-9},
issn={2184-4356},
}

TY - CONF

JO - Proceedings of the 5th International Conference on Information Systems Security and Privacy - ICISSP
TI - Nonsense Attacks on Google Assistant and Missense Attacks on Amazon Alexa
SN - 978-989-758-359-9
IS - 2184-4356
AU - Bispham, M.
AU - Agrafiotis, I.
AU - Goldsmith, M.
PY - 2019
SP - 75
EP - 87
DO - 10.5220/0007309500750087
PB - SciTePress

- Science and Technology Publications, Lda.
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