Measurement and characterization of DNS over HTTPS traffic

Abstract: Domain name system communication may provide sensitive information on users' Internet activity. DNS-over-TLS and DNS-over-HTTPS are proposals aiming at increasing the privacy of Internet end users. In this paper we present an overview of the current state in the deployment of DNS-over-HTTPS (DoH) implementations complemented by measurements of DoH traffic in terms of the incurred overhead and the possibility of the DoH detection based on the inherent characteristics of the communication patterns.