Ephraim Zimmer

According to our database, Ephraim Zimmer authored at least 16 papers between 2015 and 2025.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2025

"It's Not My Data Anymore": Exploring Non-Users' Privacy Perceptions of Medical Data Donation Apps.

Sarah Abdelwahab Gaballah, Lamya Abdullah, Ephraim Zimmer, Sascha Fahl, Max Mühlhäuser, Karola Marky

Proc. Priv. Enhancing Technol., 2025

2024

Wie stellen sich Nutzende ihren Privatsphäre-Assistenten vor?

Alina Stöver, Sara Hahn, Simon Althaus, Ephraim Zimmer, Nina Gerber

Datenschutz und Datensicherheit (dud), October, 2024

Anonify: Decentralized Dual-level Anonymity for Medical Data Donation.

Sarah Abdelwahab Gaballah, Lamya Abdullah, Mina Alishahi, Thanh Hoang Long Nguyen, Ephraim Zimmer, Max Mühlhäuser, Karola Marky

Proc. Priv. Enhancing Technol., 2024

2023

Federated Learning Attacks Revisited: A Critical Discussion of Gaps, Assumptions, and Evaluation Setups.

Aidmar Wainakh, Ephraim Zimmer, Sandeep Subedi, Jens Keim, Tim Grube, Shankar Karuppayah, Alejandro Sánchez Guinea, Max Mühlhäuser

Sensors, 2023

Label-Aware Aggregation for Improved Federated Learning.

Ahmad Khalil, Aidmar Wainakh, Ephraim Zimmer, Javier Parra-Arnau, Antonio Fernández Anta, Tobias Meuser, Ralf Steinmetz

Proceedings of the Eighth International Conference on Fog and Mobile Edge Computing, 2023

Mitigating Intersection Attacks in Anonymous Microblogging.

Sarah Abdelwahab Gaballah, Thanh Hoang Long Nguyen, Lamya Abdullah, Ephraim Zimmer, Max Mühlhäuser

Proceedings of the 18th International Conference on Availability, Reliability and Security, 2023

2022

User-Level Label Leakage from Gradients in Federated Learning.

Aidmar Wainakh, Fabrizio Ventola, Till Müßig, Jens Keim, Carlos Garcia Cordero, Ephraim Zimmer, Tim Grube, Kristian Kersting, Max Mühlhäuser

Proc. Priv. Enhancing Technol., 2022

Insiders Dissected: New Foundations and a Systematisation of the Research on Insiders.

Ephraim Zimmer, Christian Burkert, Hannes Federrath

DTRAP, 2022

On the Effectiveness of Intersection Attacks in Anonymous Microblogging.

Sarah Abdelwahab Gaballah, Lamya Abdullah, Minh Tung Tran, Ephraim Zimmer, Max Mühlhäuser

Proceedings of the Secure IT Systems, 2022

2021

User Label Leakage from Gradients in Federated Learning.

Aidmar Wainakh, Fabrizio Ventola, Till Müßig, Jens Keim, Carlos Garcia Cordero, Ephraim Zimmer, Tim Grube, Kristian Kersting, Max Mühlhäuser

CoRR, 2021

2020

Datenschutzfreundliche Erkennung und Abwehr von Insiderbedrohungen.

Ephraim Zimmer

PhD thesis, 2020

PEEPLL: privacy-enhanced event pseudonymisation with limited linkability.

Ephraim Zimmer, Christian Burkert, Tom Petersen, Hannes Federrath

Proceedings of the SAC '20: The 35th ACM/SIGAPP Symposium on Applied Computing, online event, [Brno, Czech Republic], March 30, 2020

2019

Using Context and Provenance to defend against USB-borne attacks.

Tobias Mueller, Ephraim Zimmer, Ludovico de Nittis

Proceedings of the 14th International Conference on Availability, Reliability and Security, 2019

2018

Hashing of personally identifiable information is not sufficient.

Matthias Marx, Ephraim Zimmer, Tobias Mueller, Maximilian Blochberger, Hannes Federrath

Proceedings of the Sicherheit 2018, 2018

2015

Catching Inside Attackers: Balancing Forensic Detectability and Privacy of Employees.

Ephraim Zimmer, Jens Lindemann, Dominik Herrmann, Hannes Federrath

Proceedings of the Open Problems in Network Security - IFIP WG 11.4 International Workshop, 2015

Anonymity Online for Everyone: What Is Missing for Zero-Effort Privacy on the Internet?

Dominik Herrmann, Jens Lindemann, Ephraim Zimmer, Hannes Federrath

Proceedings of the Open Problems in Network Security - IFIP WG 11.4 International Workshop, 2015