2 \label{sect:related-work}
7 \item Recognize that they can perform activity detection by observing changes in traffic volume over time
8 \item However, they cannot distinguish on/off from each other
9 \item Proposed traffic shaping does not prevent activity inference from the observation of packet lengths in specific sequences (assuming no VPN)
13 \item Also uses DNS for contextual information
14 \item Refers to previous work that considers packet lengths and sequences of packets (and uses this themselves)