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Sunday, January 26 • 2:30pm - 2:55pm
Untangling the certificate error messages

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Have you ever seen a TLS certificate error? I bet you have – be it in a browser, CLI or a graphical pop-up window. These error messages tend to be cryptic, as all sorts of things can go wrong in TLS. And the official documentation is… not necessarily helping you understand them. Furthermore, multiple TLS libraries have different sets of errors. But developer experience matters – if your developers get the security wrong, all the end users may suffer the consequences.
We are attempting to make X.509 errors usable. We want to simplify the ecosystem by consolidating the errors and their documentation (a similar thing happened to web documentation recently). We map and compare errors from the most used libraries, (better) explain what the validation errors mean and provide ready-to-use sample certificates for testing. The current state of the project can be found at https://x509errors.org.
The presented research is a part of the academic cooperation of Red Hat Czech and Masaryk University.

avatar for Martin Ukrop

Martin Ukrop

researcher, teacher, Masaryk University
Passionate about usable security, user experience, teaching and experiential learning. Actively organizing educational events in the community "Instruktoři Brno". Ceaselessly fascinated by the world.
avatar for Pavol Žáčik

Pavol Žáčik

Student, Masaryk University
Student, begginer security researcher at CRoCS - Masaryk University.

Sunday January 26, 2020 2:30pm - 2:55pm CET
D0206 Faculty of Information Technology Brno University of Technology, Božetěchova, Brno-Královo Pole, Czechia