I am a Threat Research Scientist at Facebook. I joined the team in 2014, right after obtaining my PhD from Carnegie Mellon University. Since then, I has been working on providing a better understanding of the threat ecosystem targeting Facebook users. This understanding involves building and refining signals of compromise, as well as evaluating Facebook's user remediation systems. I investigate threats targeting our platform and our users, in an effort to understand the underlying mechanics and economics of the illicit activities.
In August 2014 I received a PhD in Engineering and Public Policy (EPP) from Carnegie Mellon University. Research-wise, I worked on empirical measurements and economic modeling of online crime, towards structuring effective countermeasures. This is evident in my PhD thesis Structuring Disincentives for Online Criminals. In this effort I was fortunate to be advised by Nicolas Christin and funded by CyLab.
- L. DeKoven, T. Pottinger, S. Savage, G. Voelker, N. Leontiadis. Following Their Footsteps: Characterizing Account Automation Abuse and Defenses. In Proceedings of the 18th Internet Measurement Conference (IMC'18). Boston, MA, USA. November 2018. [to appear]
- S.Farooqi, F. Zaffar, N. Leontiadis, Z. Shafiq. Measuring and Mitigating OAuth Access Token Abuse by Collusion Networks. In Proceedings of the 17th Internet Measurement Conference (IMC'17). London, UK. November 2017. [paper]
- L. DeKoven, S. Savage, G. Voelker, and N. Leontiadis. Malicious Browser Extensions at Scale: Bridging the Observability Gap between Web Site and Browser. In Proceedings of 10th USENIX Workshop on Cyber Security Experimentation and Test (CSET'17). Vancouver, Canada. August 2017. [paper]
- N. Leontiadis, and A. Hutchings. Scripting the crime commission process in the illicit online prescription drug trade. Journal of Cybersecurity, 2015. [paper]
- N. Leontiadis, T. Moore, and N. Christin. A Nearly Four-Year Longitudinal Study of Search-Engine Poisoning. In Proceedings of the 21st ACM Conference on Computer and Communications Security (CCS'14). Scottsdale, Arizona. November 2014. [paper]
- N. Leontiadis, and N. Christin. Empirically measuring WHOIS misuse. In Proceedings of the 19th European Symposium on Research in Computer Security (ESORICS'14). Wroclaw, Poland. September 2014. [paper]
- N. Leontiadis. Structuring Disincentives for Online Criminals. PhD Thesis. Carnegie Mellon University. August 2014.
- Nominated for the ACM Doctoral Dissertation award.
- N. Leontiadis, and N. Christin. WHOIS Misuse Study. ICANN, March 2014. [report, ICANN]
- N. Leontiadis, T. Moore, and N. Christin. Pick Your Poison: Pricing and Inventories at Unlicensed Online Pharmacies. In Proceedings of the 14th ACM Conference on Electronic Commerce (EC'13), pages 621-638. Philadelphia, PA. June 2013. [paper]
- T. Moore, N. Leontiadis, and N. Christin. Fashion Crimes: Trending-Term Exploitation on the Web. In Proceedings of the 18th ACM Conference on Computer and Communications Security (CCS'11), pages 455-466. Chicago, IL. October 2011. [paper]
- N. Leontiadis, T. Moore, and N. Christin. Measuring and Analyzing Search-Redirection Attacks in the Illicit Online Prescription Drug Trade. In Proceedings of the 20th USENIX Security Symposium (USENIX'11), pages 281-298. San Francisco, CA. August 2011. [paper]
- Facebook Fellowship and Emerging Scholar Award Committee member (2015-2018)
- Facebook Secure the Internet Grant Committee member (2018).
- 13th IEEE Symposium on Electronic Crime Research (eCrime 2018). PC Member
- ACM Transactions on Privacy and Security. Reviewer (2018)
- 2018 Network and Distributed System Security Symposium (NDSS). PC Member
- 26th USENIX Security Symposium 2017. Posters PC Member
- 12th Symposium on Electronic Crime Research (eCrime) 2017. PC member.
- Journal of Qualitative Criminal Justice and Criminology. Reviewer.
- 25th USENIX Security Symposium 2016. PC member.
- 46th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DNS) 2016. PC member.
- 15th Workshop on the Economics of Information Security (WEIS) 2016. PC member.
- ACM Transactions on Information and System Security (TISSEC). Reviewer.
- 7th Workshop on Simplifying Complex Networks for Practitioners (SIMPLEX) 2014. PC member.
- 23rd USENIX Security Symposium 2014. External reviewer.
- 27th Computer Security Foundations Symposium (CSF) 2014. External reviewer.
- 6th Workshop on Simplifying Complex Networks for Practitioners (SIMPLEX) 2014. PC member.
- 35th IEEE Symposium on Security and Privacy (Oakland) 2014. External reviewer.
- 12th Workshop on the Economics of Information Security (WEIS) 2013. External reviewer.
My PGP key details:
Fingerprint = 85E1 A087 B5C9 901B 7045 433B 381B EC5E A8D6 F5EC