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SpotOn: Adversarially Robust Keyword Spotting on Resource-Constrained IoT Platforms

We propose a novel speech keyword spotting mechanism which is robust against attacks exploiting the inherent vulnerabilities of an ML model in correctly classifying the spoken word.
July 2024 ACM AsiaCCS
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SPAT: Semantic-Preserving Adversarial Transformation for Perceptually Similar Adversarial Examples

We propose a novel Semantic-Preserving Adversarial Transformation (SPAT) framework which facilitates an advantageous trade-off between the attack success rate and the perceptual similarity between the benign and adversarial examples.
September 2023 ECAI
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SmrtComp: Intelligent and Online CAN Data Compression

We introduce a novel Controller Area Network (CAN) traffic data compression mechanism that aims to achieve a much larger storage efficiency by storing recent data in a lossless format and compressing older data in increasingly lossy formats.
September 2023 ITSC
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ZBCAN: A Zero-Byte CAN Defense System

We introduce a defense system that uses zero bytes of the automotive controller area network (CAN) frame to secure against the most common CAN attacks, including message injection, replay, fuzzing, impersonation, flooding, collision injection, bus-off, and network mapping attacks, without using message authentication codes.
August 2023 USENIX Security
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Poster: Practical Swarm Attestation using Probabilistic Program Integrity Verification

We propose a novel program integrity verification mechanism which is inherently designed considering the scalability in a swarm setting reducing the total swarm attestation time as compared to the prior art.
February 2023 VehicleSec
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Demo: Attacks on CAN Error Handling Mechanism

We discuss the security vulnerabilities of automotive controller area network (CAN) and present three attacks which exploit them.
February 2022 AutoSec
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Practical Attestation for Edge Devices Running Compute Heavy Machine Learning Applications

We present a practical runtime remote attestation framework that segments the software and randomizes the integrity check of these segments over short random intervals leading to a novel performance-vs-security trade-off.
December 2021 ACSAC
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PASAN: Detecting peripheral access concurrency bugs within bare-metal embedded applications

We propose the first static analysis tool to detect peripheral access concurrency issues for embedded systems.
August 2021 USENIX Security
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Exposing new vulnerabilities of error handling mechanism in CAN

We discover three major vulnerabilities in the error handling mechanism of the automotive controller area network that could be exploited to launch a variety of attacks including a denial-of-service attack against benign electronic control units.
August 2021 USENIX Security
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Cumulative message authentication codes for resource-constrained IoT networks

To provide message authenticity in IoT, we employ a speculation procedure for predicting future message values to achieve an advantageous trade-off between the cryptographic strength and the latency in processing of the message authentication codes.
July 2021 IEEE IoT
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Evading voltage-based intrusion detection on automotive CAN

We discover a novel tactic that can be exploited by two malicious electronic control units (ECUs) on an automotive controller area network to masquerade a benign ECU while evading voltage-based intrusion detection system.
February 2021 NDSS
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3D printed graphene-based self-powered strain sensors for smart tires in autonomous vehicles

We design and print a piezoelectric patch for harvesting energy from the automobile tires, which is utilized for powering strain sensing and secure wireless data transfer.
October 2020 Nature Communications
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BlueShield: Detecting spoofing attacks in Bluetooth low energy networks

We present a legacy-friendly, non-intrusive monitoring system to defend Bluetooth users against spoofing attacks through which an attacker can impersonate an IoT device and feed malicious data to its users.
October 2020 RAID
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BLESA: Spoofing attacks against reconnections in Bluetooth low energy

We discover critical security vulnerabilities in the Bluetooth Low Energy connection protocol, which can be exploited to impersonate an IoT device and provide spoofed data to a previously-paired user device.
August 2020 USENIX WOOT (Best Paper Award)
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Cumulative message authentication codes for resource-constrained networks

To provide message authenticity in IoT, we enable the verifier to achieve an advantageous trade-off between the cryptographic strength and the latency in processing of the message authentication codes.
June 2020 IEEE CNS
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Policy enforcement in dynamic spectrum sharing

We discuss some of the critical security and privacy threats that impact the dynamic spectrum sharing model, and present a taxonomy for classifying the various threats and the developed countermeasures.
April 2020 Wiley
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Group signatures with probabilistic revocation

We propose a novel notion of probabilistic revocation, which enables a verifier to check the revocation status of the private key of a given signature very efficiently.
June 2019 U. S. Patent
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Crowd-sourced authentication for enforcement in dynamic spectrum sharing

To realize an effective enforcement entity in the spectrum sharing environment, we propose a crowd-sourcing mechanism to addresses the critical challenges which include little or no knowledge of transmission parameters.
May 2019 IEEE TCCN
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Energy harvesting and strain sensing in smart tire for next generation autonomous vehicles

We design a flexible organic piezoelectric material for harvesting energy from the automobile tires, which is utilized for powering strain sensing and wireless data transfer with enhanced frame rates.
December 2018 Applied Energy
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Enforcement in spectrum sharing: Crowd-sourced blind authentication of co-channel transmitters

To realize an effective enforcement entity in the spectrum sharing environment, we propose a crowd-sourcing mechanism to addresses the critical challenges which include little or no knowledge of transmission parameters.
October 2018 IEEE DySPAN
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Direct anonymous attestation with efficient verifier-local revocation for subscription system

We propose a novel anonymous attestation scheme which enables efficient revocation of a platform by shifting most of the computational and communication costs from the signature generation phase to the key acquisition phase.
June 2018 ACM AsiaCCS
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Transmitter authentication using hierarchical modulation in dynamic spectrum sharing

We show that the addition of the controlled inter-symbol interference introduces redundancy in a message signal which can be utilized to embed an authentication signal without sacrificing message throughput or increasing power.
August 2017 JNCA
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Transmitter authentication in dynamic spectrum sharing

We develop novel techniques to enable a regulatory enforcement entity to uniquely identify a transmitter and collect verifiable evidence of a rogue transmission that can be used later during an adjudication process.
February 2017 Virginia Tech
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PHY-layer authentication using duobinary signaling for spectrum enforcement

We show that the addition of the controlled inter-symbol interference introduces redundancy in a message signal which can be utilized to embed an authentication signal without sacrificing message throughput or increasing power.
May 2016 IEEE TIFS
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Group signatures with probabilistic revocation: A computationally-scalable approach for providing privacy-preserving authentication

We propose a novel notion of probabilistic revocation, which enables a verifier to check the revocation status of the private key of a given signature very efficiently.
August 2015 ACM CCS
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Security and enforcement in spectrum sharing

We review some of the critical security and privacy threats that impact the dynamic spectrum sharing model, and propose a taxonomy for classifying the various threats and the developed countermeasures.
August 2014 Proc. IEEE (Invited Paper)
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Blind transmitter authentication for spectrum security and enforcement

We develop a novel mechanism for embedding an authentication information into the transmitted waveform, which can be extracted by an enforcement entity without knowing the transmission parameters.
May 2014 ACM CCS
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PHY-layer authentication using hierarchical modulation and duobinary signaling

We show that the addition of the controlled inter-symbol interference introduces redundancy in a message signal which can be utilized to embed an authentication signal without sacrificing message throughput or increasing power.
February 2014 ICNC
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PHY-layer authentication by introducing controlled inter symbol interference

We show that the duobinary signaling mechanism introduces redundancy in a message signal which can be utilized to embed an authentication signal without sacrificing message throughput or increasing power.
August 2013 IEEE CNS
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Achievable secrecy sum-rate in a fading MAC-WT with power control and without CSI of eavesdropper

We illustrate that the cooperative jamming strategy significantly boosts the secrecy sum-rate rate of the transmitter even if it does not know the channel state information of the eavesdropper.
June 2012 SPCOM
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