consider valid under the definitions and parameters described in Section \[sec:mathishard\]. Figure \[fig:clientstests\] demonstrates the rapid growth of network measurements originating from Iran after the inclusion of NDT in $\mu$Torrent, with unique clients representing the number of IP addresses seen and tests describing the total number of tests. While M-Lab contains measurements from 2009, we consider data beginning in 2010 to take advantage of the critical mass of clients that resulted from the inclusion.

During the process of preparing and running our experiments, we took special care to not violate any laws or, considering the diminishing opportunities for international collaboration, expose individuals within Iran to potential harm. All our experiments were in accordance to any applicable terms of service and within reasonable considerations of network usage, taking care to not engage in behavior that would be considered intrusive. The contribution of measurements of a network to NDT or M-Lab does not denote political activities on the part of the user, particularly as the use of Bittorrent file-sharing has broad appeal and apolitical implications. Moreover, use of Bittorrent or NDT do not appear to violate Iranian law, especially given the copyright and intellectual property framework of Iran. All data originating from 