1. 2016. Police are increasingly using social media surveillance tools. https://techcrunch.com/2016/09/23/police-are-increasingly-using-social-media-surveillance-tools/. (2016). 2016. Police are increasingly using social media surveillance tools. https://techcrunch.com/2016/09/23/police-are-increasingly-using-social-media-surveillance-tools/. (2016).
2. 2017. Tor Browser. https://www.torproject.org/. (2017). 2017. Tor Browser. https://www.torproject.org/. (2017).
3. Geo-indistinguishability
4. Supporting anonymous location queries in mobile environments with privacygrid
5. Haze