Next FOSDEM [1] will, again, have a security devroom, this time on the topic of "Practial use of security technologies". We'd like to invite submissions of talks and presentations from developers, security researchers and other interested representatives of open source and free software and hardware projects. This is the call for talks and presentations that will take place in the Security devroom at FOSDEM 2020. Our topic this year: This covers security protocols and their usability, the usability of open source crypto libraries and applications from both developer and user side, pitfails of using crypto, security threats, vulnerabilities and their mitigations in real-world use cases. For up-to-date submission and event information: https://github.com/security-devroom/fosdem-2020 The security devroom will be held on Saturday 1st February 2019 in Brussels, Belgium at ULB. Feel free to forward this announcement to any relevant FOSS project mailing list. [1] https://fosdem.org/2020/