Title
Backpage and Bitcoin: Uncovering Human Traffickers
Abstract
Sites for online classified ads selling sex are widely used by human traffickers to support their pernicious business. The sheer quantity of ads makes manual exploration and analysis unscalable. In addition, discerning whether an ad is advertising a trafficked victim or an independent sex worker is a very difficult task. Very little concrete ground truth (i.e., ads definitively known to be posted by a trafficker) exists in this space. In this work, we develop tools and techniques that can be used separately and in conjunction to group sex ads by their true owner (and not the claimed author in the ad). Specifically, we develop a machine learning classifier that uses stylometry to distinguish between ads posted by the same vs. different authors with 90% TPR and 1% FPR. We also design a linking technique that takes advantage of leakages from the Bitcoin mempool, blockchain and sex ad site, to link a subset of sex ads to Bitcoin public wallets and transactions. Finally, we demonstrate via a 4-week proof of concept using Backpage as the sex ad site, how an analyst can use these automated approaches to potentially find human traffickers.
Year
DOI
Venue
2017
10.1145/3097983.3098082
KDD
Field
DocType
ISBN
Data mining,Internet privacy,Computer security,Computer science,Proof of concept,Stylometry,Blockchain,Human trafficking,Learning classifier system
Conference
978-1-4503-4887-4
Citations 
PageRank 
References 
6
0.47
3
Authors
5
Name
Order
Citations
PageRank
Rebecca S. Portnoff1503.20
Danny Yuxing Huang21108.15
Periwinkle Doerfler3172.04
Sadia Afroz4202.16
damon mccoy52073125.49