Cas Cremers

Prof. Dr. Cas Cremers

Prof. Dr. Cas Cremers is faculty member at the CISPA Helmholtz Center for Information Security in Saarbruecken, Germany.

He obtained his PhD in 2006 from Eindhoven University of Technology in the Netherlands. From 2006 to 2013 he was a postdoctoral researcher, and senior researcher and lecturer, at ETH Zurich in Switzerland. In 2013 he moved to the University of Oxford as an Associate Professor, and became full Professor at the University of Oxford in 2015. In 2018 he joined CISPA in Germany.

His work includes co-developing the Scyther tool and the Tamarin prover for the analysis of security protocols, and working on provable foundations for secure messaging, including the first proofs of the Signal protocol. He contributed to the development of IETF's TLS 1.3 and MLS, and was a member of the DP3T team whose privacy-preserving protocols laid the foundation for the GAEN framework used in Covid proximity-tracing apps.

Areas of interest

  • security protocols
  • formal methods
  • applied cryptography
  • analysis tools
  • automated verification
  • protocols and standards

Open positions new

We have open phd and postdoc positions.

My research involves the application of formal methods and cryptography to the analysis and development of secure systems. The resulting contributions include:

  1. Formal foundations of security

    How to mathematically define secure systems and their properties, and how to reason about them. For example:

  2. Supportive technologies

    We develop automated tools for analyzing security protocols:

    A feature comparison of our tools is also available.

  3. Application example: Improving security standards

    We have used our analysis methods and tools in many real-world case studies, yielding direct impact. For example:

A complete list of publications, recent manuscripts, and bibtex files can be found here.