Stefanos Koffas

Publication Activity (10 Years)

Years Active: 2021-2024
Publications (10 Years): 24

Top Topics

Systematic Evaluation

Authorship Attribution

Laplacian Eigenmaps

Top Venues

Publications

Coen Schoof, Stefanos Koffas, Mauro Conti, Stjepan Picek
Beyond PhantomSponges: Enhancing Sponge Attack on Object Detection Models. WiseML@WiSec (2024)
Marco Arazzi, Stefanos Koffas, Antonino Nocera, Stjepan Picek
Let's Focus: Focused Backdoor Attack against Federated Transfer Learning. CoRR (2024)
Jona te Lintelo, Stefanos Koffas, Stjepan Picek
The SpongeNet Attack: Sponge Weight Poisoning of Deep Neural Networks. CoRR (2024)
Hanbo Cai, Pengcheng Zhang, Hai Dong, Yan Xiao, Stefanos Koffas, Yiming Li
Toward Stealthy Backdoor Attacks Against Speech Recognition via Elements of Sound. IEEE Trans. Inf. Forensics Secur. 19 (2024)
Xiaoyun Xu, Zhuoran Liu, Stefanos Koffas, Shujian Yu, Stjepan Picek
BAN: Detecting Backdoors Activated by Adversarial Neuron Noise. CoRR (2024)
Simen Gaure, Stefanos Koffas, Stjepan Picek, Sondre Rønjom
Large Language Models as Covert Channels... a Systematic Analysis. CoRR (2024)
Christina Kreza, Stefanos Koffas, Behrad Tajalli, Mauro Conti, Stjepan Picek
Backdoors on Manifold Learning. WiseML@WiSec (2024)
Marco Arazzi, Mauro Conti, Stefanos Koffas, Marina Krcek, Antonino Nocera, Stjepan Picek, Jing Xu
BlindSage: Label Inference Attacks against Node-level Vertical Federated Graph Neural Networks. CoRR (2023)
Hanbo Cai, Pengcheng Zhang, Hai Dong, Yan Xiao, Stefanos Koffas, Yiming Li
Towards Stealthy Backdoor Attacks against Speech Recognition via Elements of Sound. CoRR (2023)
Mauro Conti, Nicola Farronato, Stefanos Koffas, Luca Pajola, Stjepan Picek
Invisible Threats: Backdoor Attack in OCR Systems. CoRR (2023)
Stefanos Koffas, Luca Pajola, Stjepan Picek, Mauro Conti
Going in Style: Audio Backdoors Through Stylistic Transformations. ICASSP (2023)
Gorka Abad, Jing Xu, Stefanos Koffas, Behrad Tajalli, Stjepan Picek
A Systematic Evaluation of Backdoor Trigger Characteristics in Image Classification. CoRR (2023)
Bart Pleiter, Behrad Tajalli, Stefanos Koffas, Gorka Abad, Jing Xu, Martha Larson, Stjepan Picek
Tabdoor: Backdoor Vulnerabilities in Transformer-based Neural Networks for Tabular Data. CoRR (2023)
Matteo Gioele Collu, Tom Janssen-Groesbeek, Stefanos Koffas, Mauro Conti, Stjepan Picek
Dr. Jekyll and Mr. Hyde: Two Faces of LLMs. CoRR (2023)
Stefanos Koffas, Praveen Kumar Vadnala
On the Effect of Clock Frequency on Voltage and Electromagnetic Fault Injection. CoRR (2023)
Jing Xu, Stefanos Koffas, Oguzhan Ersoy, Stjepan Picek
Watermarking Graph Neural Networks based on Backdoor Attacks. EuroS&P (2023)
Arthur Mercier, Nikita Smolin, Oliver Sihlovec, Stefanos Koffas, Stjepan Picek
Backdoor Pony: Evaluating backdoor attacks and defenses in different domains. SoftwareX 22 (2023)
Stefanos Koffas, Luca Pajola, Stjepan Picek, Mauro Conti
Going In Style: Audio Backdoors Through Stylistic Transformations. CoRR (2022)
Stefanos Koffas, Stjepan Picek, Mauro Conti
Dynamic Backdoors with Global Average Pooling. AICAS (2022)
Stefanos Koffas, Stjepan Picek, Mauro Conti
Dynamic Backdoors with Global Average Pooling. CoRR (2022)
Jing Xu, Rui Wang, Stefanos Koffas, Kaitai Liang, Stjepan Picek
More is Better (Mostly): On the Backdoor Attacks in Federated Graph Neural Networks. ACSAC (2022)
Stefanos Koffas, Praveen Kumar Vadnala
On the Effect of Clock Frequency on Voltage and Electromagnetic Fault Injection. ACNS Workshops (2022)
Stefanos Koffas, Jing Xu, Mauro Conti, Stjepan Picek
Can You Hear It?: Backdoor Attacks via Ultrasonic Triggers. WiseML@WiSec (2022)
Stefanos Koffas, Jing Xu, Mauro Conti, Stjepan Picek
Can You Hear It? Backdoor Attacks via Ultrasonic Triggers. CoRR (2021)