NDSS2020 Packet-Level Signatures for Smart Home Devices

SESSION 2B-4 Packet-Level Signatures for Smart Home Devices

Smart home devices are vulnerable to passive inference attacks based on network traffic, even in the presence of encryption. In this paper, we present PINGPONG , a tool that can automatically extract packet-level signatures (i.e., simple sequences of packet lengths and directions) from the network traffic of smart home devices, and use those signatures to detect occurrences of specific device events (e.g., light bulb turning ON/OFF). We evaluated PINGPONG on popular smart home devices ranging from smart plugs and thermostats to cameras and Roomba (vacuum cleaner) robots. We were able to: (1) automatically extract, previously unknown, signatures from the devices; (2) use those signatures to detect the occurrences of specific device events with an average recall of more than 97%; (3) show that the signatures are unique among tens of millions of packets of real world network traffic (average false positive rate is 1 in every 2.5 million packets); and (4) show that our signatures are resilient against state-of-the-art VPN-based defenses that perform traffic shaping.


PAPER
https://www.ndss-symposium.org/wp-con...

SLIDES


AUTHORS
Rahmadi Trimananda (University of California,Irvine)
Janus Varmarken (University of California,Irvine)
Athina Markopoulou (University of California,Irvine)
Brian Demsky (University of California,Irvine)


Network and Distributed System Security (NDSS) Symposium 2020, 23-26 February 2019, Catamaran Resort Hotel & Spa in San Diego, California.
https://www.ndss-symposium.org/ndss-p...

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The Network and Distributed System Security Symposium (NDSS) fosters information exchange among researchers and practitioners of network and distributed system security. The target audience includes those interested in practical aspects of network and distributed system security, with a focus on actual system design and implementation. A major goal is to encourage and enable the Internet community to apply, deploy, and advance the state of available security technologies.
https://www.ndss-symposium.org/


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