Hannes Tschofenig

Distinguished Engineer, Arm Ltd. and Mbed, "Securing IoT Communication: The Path from SSL to DTLS & Compact TLS"


Securing IoT Communication: The Path from SSL to DTLS & Compact TLS


Hannes Tschofenig is a Distinguished Engineer with Arm Ltd. His focus is on developing global standards to make the Internet more secure. He has been particularly active in the IETF, where, for the past 15 years he has contributed to more than 80 RFCs on security, privacy and various Internet protocols. Hannes co-chaired several IETF groups and was a member of the Internet Architecture Board (IAB). Currently, he is a board member of OMA SpecWorks. Hannes Tschofenig is also a core devoloper of Mbed TLS.


This talk will revisit the development of TLS and DTLS over time. SSL was developed in the late 1990s when Internet connectivity was slow and bandwidth was limited. More than 20 years later we are now looking at TLS for deployments where the Internet connectivity is even slower and more bandwidth constrained with low-power IoT networking technologies, such as LoRaWAN.
During those 20 years the IETF TLS working group has developed numerous extensions and optimizations to make TLS work better in all sorts of conditions. This talk will survey these efforts, and give an overview of their improvements and tradeoffs, concluding with the most recent developments in this area, such as certificate compression and Compact TLS (cTLS).