http://groups.csail.mit.edu/mac/classes/6.805/student-papers/fall95-papers/rigby-anonymity.html
origin - https://www.pipiscrew.com/2018/10/karina-rigby-anonymity-on-the-internet-must-be-protected-1995/ karina-rigby-anonymity-on-the-internet-must-be-protected-1995