One bad apple can spoil your IPv6 privacy

IPv6 is being more and adopted, in part to facilitate the millions of smart devices that have already been installed at home. Unfortunately, we find privacy a substantial fraction end-users still risk, despite efforts by ISPs electronic vendors improve end-user security, e.g., adopting prefix rotation extensions. By analyzing passive data from large ISP, around 19% end-users' can be risk. When investigate root causes, notice single device home encodes its MAC address into utilized as tracking identifier for entire prefix---even if other use Our results show IoT contribute most this leakage and, lesser extent, personal computers mobile devices. To our surprise, some popular manufacturers not yet adopted extensions could otherwise mitigate Finally, third-party providers, hypergiants, track up 17% subscriber lines study.