Ali Sadeghi Jahromi, AbdelRahman Abdou (Carleton University)

The Internet’s Public Key Infrastructure (PKI) has been used to provide security to HTTPS and other protocols over the Internet. Such infrastructure began to be increasingly relied upon for DNS security. DNS-over-TLS (DoT) is one recent rising and prominent example, whereby DNS traffic between stub and recursive resolver gets transmitted over a TLS-secured session. The security research community has studied and improved security shortcomings in the web certificate ecosystem. DoT’s certificates, on the other hand, have not been investigated comprehensively. It is also unclear if DoT client-side tools (e.g., stub resolvers) enforce security properly as modern-day browsers and mail clients do for HTTPS and secure email. In this research, we compare the DoT and HTTPS certificate ecosystems. Preliminary results are so far promising, as they show that DoT appears to have benefited from the PKI security advancements that were mostly tailored to HTTPS.

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Ting Chen (University of Electronic Science and Technology of China), Rong Cao (University of Electronic Science and Technology of China), Ting Li (University of Electronic Science and Technology of China), Xiapu Luo (The Hong Kong Polytechnic University), Guofei Gu (Texas A&M University), Yufei Zhang (University of Electronic Science and Technology of China), Zhou Liao (University…

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