Assessing the Privacy Benefits of Domain Name Encryption
Nguyen Phong Hoang, Arian Akhavan Niaki, Nikita Borisov, Phillipa Gill, Michalis Polychronakis · 2020
As Internet users have become more savvy about the potential for their Internet communication to be observed, the use of network traffic encryption technologies (e.g., HTTPS/TLS) is on the rise. However, even when encryption is enabled, users leak information about the domains they visit via DNS queries and via the Server Name Indication (SNI) extension of TLS. Two recent proposals to ameliorate this issue are DNS over HTTPS/TLS (DoH/DoT) and Encrypted SNI (ESNI).