A couple of things you may be interested in reading. http://www.verisign.com/assets/labs/Measuring-the-Leakage-of-Onion-at-the-Root.pdf http://www.verisign.com

A couple of things you may be interested in reading. http://www.verisign.com/assets/labs/Measuring-the-Leakage-of-Onion-at-the-Root.pdf http://www.verisign.com/assets/labs/Measuring-the-Leakage-of... https://www.icann.org/en/system/files/files/sac-090-en.pdf https://www.icann.org/en/system/files/files/sac-090-en.pdf