NDLI: Facebook Inspector (FbI): Towards automatic real-time detection of malicious content on Facebook

Content Provider	Springer Nature Link
Author	Dewan, Prateek Kumaraguru, Ponnurangam
Copyright Year	2017
Abstract	Online Social Networks witness a rise in user activity whenever a major event makes news. Cyber criminals exploit this spur in user engagement levels to spread malicious content that compromises system reputation, causes financial losses and degrades user experience. In this paper, we collect and characterize a dataset of 4.4 million public posts generated on Facebook during 17 news-making events (natural calamities, sports, terror attacks, etc.) over a 16-month time period. From this dataset, we filter out two sets of malicious posts, one using URL blacklists and another using human annotations. Our observations reveal some characteristic differences between malicious posts obtained from the two methodologies, thus demanding a twofold filtering process for a more complete and robust filtering system. We empirically confirm the need for this twofold filtering approach by cross-validating supervised learning models obtained from the two sets of malicious posts. These supervised learning models include Naive Bayesian, Decision Trees, Random Forest, and Support Vector Machine-based models. Based on this learning, we implement Facebook Inspector, a REST API-based browser plug-in for identifying malicious Facebook posts in real time. Facebook Inspector uses class probabilities obtained from two independent supervised learning models based on a Random Forest classifier to identify malicious posts in real time. These supervised learning models are based on a feature set comprising of 44 features and achieve an accuracy of over 80% each, using only publicly available features. During the first 9 months of its public deployment (August 2015–May 2016), Facebook Inspector processed 0.97 million posts at an average response time of 2.6 s per post and was downloaded over 2500 times. We also evaluate Facebook Inspector in terms of performance and usability to identify further scope for improvement.
Starting Page	1
Ending Page	25
Page Count	25
File Format	PDF
ISSN	18695450
Journal	Social Network Analysis and Mining
Volume Number	7
Issue Number	1
e-ISSN	18695469
Language	English
Publisher	Springer Vienna
Publisher Date	2017-04-24
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Facebook Malicious content Machine learning Real-time system Data Mining and Knowledge Discovery Applications of Graph Theory and Complex Networks Game Theory, Economics, Social and Behav. Sciences Statistics for Social Science, Behavorial Science, Education, Public Policy, and Law Methodology of the Social Sciences
Content Type	Text
Resource Type	Article
Subject	Information Systems Human-Computer Interaction Communication Computer Science Applications Media Technology

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