Vern Paxson

Examining How the Great Firewall Discovers Hidden Circumvention Servers

2015

Recently, the operators of the national censorship infrastructure of China began to employ "active probing" to detect and block the use of privacy tools. This probing works by passively monitoring the network for suspicious traffic, …

Header Enrichment or ISP Enrichment?

2015

HTTP header enrichment allows mobile operators to annotate HTTP connections via the use of a wide range of request headers. Operators employ proxies to introduce such headers for operational purposes, and---as recently widely publicized---also to …