Saving Brian's Privacy: the Perils of Privacy Exposure through Reverse DNS. (arXiv:2202.01160v2 [cs.NI] UPDATED)

Given the importance of privacy, many Internet protocols are nowadays
designed with privacy in mind (e.g., using TLS for confidentiality). Foreseeing
all privacy issues at the time of protocol design is, however, challenging and
may become near impossible when interaction out of protocol bounds occurs. One
demonstrably not well understood interaction occurs when DHCP exchanges are
accompanied by automated changes to the global DNS (e.g., to dynamically add
hostnames for allocated IP addresses). As we will substantiate, this is a …

brian dns exposure privacy reverse reverse dns