Confidential Technologies GmbH offers a range of consulting services for security research and development. Dominik Schürmann and Vincent Breitmoser are leading a team of experts in the area of real-world network security protocols and mobile security.

Dr.-Ing. Dominik Schürmann conducts network protocol research and published over 15 academic papers on international conferences and journals. He is the maintainer of OpenKeychain, the OpenPGP implementation on Android, and found several security vulnerabilities in Android's in-app billing, email apps, and messengers.

Vincent Breitmoser is a developer and consultant specialized in Android security and encryption protocols. He is one of the main developers of K-9 Mail, the leading open source email app for Android, and participated in writing the Autocrypt specification.

Please contact us for consulting services:

  • Analysis and implementation of security protocols
  • OpenPGP consulting
  • Double Ratchet based protocols (Signal, OMEMO,…)
  • Key exchange protocols (Password Authenticated Key Exchanges)
  • Email security
  • Android security
  • F-Droid Deployments and Whitelabeling

Previous Projects

Our consultants worked at several projects as freelancers or for Confidential Technologies GmbH.


We are the maintainers of OpenKeychain, the OpenPGP implementations on Android, and one of the main developers of K-9 Mail. We also hosted organizations for Google Summer of Code 2014-2017.


We are actively participating in the design of new standards for end-to-end encryption. Currently, our main effort is the participation in the Autocrypt project.


Academic Publications

We co-authored several academic papers in the area of security protocols, usable security, and device-to-device pairing.

Full list of publications