Welcome
Me

I'm PhD student at the Horst Görtz Institute for IT Security, Chair for Net­work and Data Se­cu­ri­ty, Ruhr-University Bochum, Germany. My research topics are cryptography and protocol security. You can find my papers at my Google Scholar profile or below.

Contact/Links

Twitter@roeslpa
GitHub/roeslpa
Mailpaul.roesler [at] rub.de
PGP key

Short CV

02/18Research visit with Bertram Poettering at Royal Holloway, University of London
10/16 - nowPhD student at Horst Görtz Institute for IT Security, Chair for Net­work and Data Se­cu­ri­ty, Ruhr-University Bochum
10/15 - nowM.Sc. IT Security, Ruhr-University Bochum
04/15 - 07/15Intern at KPMG Security Consulting
09/14 - 02/15 & 10/15 - 09/16Working student at Qabel
10/12 - 09/15B.Sc. IT Security, Ruhr-University Bochum

Publications

Towards Bidirectional Ratcheted Key Exchange
Bertram Poettering, Paul Rösler
To appear at IACR International Cryptology Conference, CRYPTO 2018
Extended version: Asynchronous ratcheted key exchange [PDF]

More is Less: On the End-to-End Security of Group Chats in Signal, WhatsApp, and Threema
Paul Rösler, Christian Mainka, Jörg Schwenk
IEEE European Symposium on Security and Privacy, EuroS&P 2018: [PDF full version], [Blog 1], [Blog 2]

Attacking Deterministic Signature Schemes using Fault Attacks
Damian Poddebniak, Juraj Somorovsky, Sebastian Schinzel, Manfred Lochter, Paul Rösler
IEEE European Symposium on Security and Privacy, EuroS&P 2018: [PDF]

Your cloud in my company: Modern rights management services revisited
Martin Grothe, Paul Rösler, Johanna Jupke, Jan Kaiser, Christian Mainka, Jörg Schwenk
International Conference on Availability, Reliability and Security, ARES 2016: [PDF full version]

How to Break Microsoft Rights Management Services
Martin Grothe, Christian Mainka, Paul Rösler, Jörg Schwenk
USENIX Workshop on Offensive Technologies, WOOT 2016: [PDF]

Architektur- und Sicherheitsanalyse von Tresorit und Tresorit DRM
Paul Rösler
Bachelor Thesis 2015: [PDF]

Weihnachtsgeschichten
Paul Rösler
2017: [PDF]; 2016: [PDF]; 2015: [PDF]

Talks

Generalization and Modularization of the ACCE Model
SKECH Workshop 2018: [PDF slides]
Consequences of Complexity in Group Instant Messaging using the Example of WhatsApp and Signal
RuhrSec 2018: [PDF slides], [Video]
More is Less: On the End-to-End Security of Group Chats in Signal, WhatsApp, and Threema
IEEE European Symposium on Security and Privacy, EuroS&P 2018: [PDF slides]
Complexity of Group Communication in Instant Messaging
CryptoAction Symposium 2018: [PDF slides]
Instant Messaging in Gruppen: Schwachstellen trotz sicherer Verschlüsselung
Paderborner Tag der IT-Sicherheit 2018: [PDF slides]
On the end-to-end security of group chats
IACR Real World Crypto, RWC 2018: [PDF slides], [Video]
Datenschutz und Sicherheit von Instant-Messaging-Protokollen
a-i3/BSI-Symposium 2017: [PDF slides]

Paul Rösler + 11.07.2018