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We have a data collection gap, roughly corresponding to the time Silk Road was taken down. Shortly after the Silk Road take-down we started measuring Black Market Reloaded, and realized that it has already made up for a vast portion of the volumes previously seen on Silk Road
Measuring the Longitudinal Evolution of the Online Anonymous Marketplace Ecosystem.
USENIX Security, pp.33-48, (2015)
February 2011 saw the emergence of Silk Road, the first successful online anonymous marketplace, in which buyers and sellers could transact with anonymity properties far superior to those available in alternative online or offline means of commerce. Business on Silk Road, primarily involving narcotics trafficking, rapidly boomed, and comp...More
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- In February 2011, a new Tor hidden service , called “Silk Road,” opened its doors.
- The Silk Road operator famously declared in August 2013 in an interview with Forbes, that the “War on Drugs” had been won by Silk Road and its patrons .
- While this was an overstatement, the business model of Silk Road had proven viable enough that competitors, such as Black Market Reloaded, Atlantis, or the Sheep Marketplace had emerged
- In February 2011, a new Tor hidden service , called “Silk Road,” opened its doors
- Embolden by the anonymity properties Silk Road provided, sellers and buyers on Silk Road mostly traded in contraband and narcotics
- The Silk Road operator famously declared in August 2013 in an interview with Forbes, that the “War on Drugs” had been won by Silk Road and its patrons 
- We have a data collection gap, roughly corresponding to the time Silk Road was taken down. (We do not show volumes for Atlantis, which are negligible, in the order of 2,000–3,000/day.) Shortly after the Silk Road take-down we started measuring Black Market Reloaded, and realized that it has already made up for a vast portion of the volumes previously seen on Silk Road
- Though, a massive scam on Silk Road 2.0 caused dramatic loss of user confidence, which is evidenced by the rapid decrease until April 2014, before it starts recovering
- We internally confirmed that the independent estimations of total market volumes varied by less than 10% at any single point in time, and less than 5% on average, well within expected margin of errors for data indirectly estimated from potentially noisy sources.6
- Benthall  reports that in September 2014, the administrator, talking to an undercover agent working on Silk Road 2’s staff, reports around 6M of monthly sales; and later amends this number to 8M. This corresponds to a daily sales volume of 200,000–250,000 which is very close to what we report in Figure 5 for Silk Road 2 at that given time
- The authors' measurement methodology consists of 1) crawling online anonymous marketplaces, and 2) parsing them.
- Table 1 lists all the anonymous marketplaces for which the authors have data.
- The authors scraped 35 different marketplaces a total of 1,908 times yielding a dataset of 3.2 TB in size.
- The sheer size of the data corpus the authors are considering, as well as other challenging factors led them to devise a custom web scraping framework built on top of Scrapy  and Tor , which the authors discuss first.
- The authors highlight how the authors decide to parse marketplaces, before touching on validation techniques the authors use to ensure soundness of the analysis
- The authors present the results in Figure 5 where the authors show the total volume, per marketplace the authors study, over time.
- The authors do not have sales data for Sheep Marketplace due to incomplete parses, but the authors do believe that the combination of both markets made up for the loss of Silk Road.
- In November 2014, Operation Onymous  resulted in the take-down of Silk Road 2 and a number of less marketplaces
- This did significantly affect total sales, but the authors immediately see a rebound by people going to Evolution and Agora.
- A study of this kind brings up a number of important discussion points. The authors focus here on what the authors consider are the most salient ones: validation, ethics, and potential public policy take-aways. 5.1 Validation
Scientific measurements should be amenable to validation.
- Chat transcripts place weekly volumes at 475,000/week in late March 2012 for instance: this is consistent with the data previously reported  and which the authors use for documenting Silk Road 1.
- Evidence GX250 contains a personal ledger whichEven though anonymous online marketplaces are a relatively recent development in the overall online crime ecosystem, the longitudinal measurements show that in the short four years since the development of the original Silk Road, total volumes have reached up to 700,000 daily and are generally stable around 300,000-500,000 a day, far exceeding what had been previously reported.
- While the paper does not answer these questions, the authors believe that the data collection methodology the authors described, as well as some of the data the authors have collected, may enable further research in the field
- Table1: Markets crawled. The table describes which markets were crawled, the time the measurements spanned, and the number of snapshots that were taken. ∗ denote market sites seized by the police, † voluntary shutdowns, and ‡ (suspected) fraudulent closures (owners absconding with escrow money)
- The past decade has seen a large number of detailed research efforts aiming at gathering actual measurements from various online criminal ecosystems in order to devise meaningful defenses; see, e.g., [13,14,22,26,27,28, 29,32,40,41]. Anderson et al  and Thomas et al  provide a very good overview of the field. Closest among these papers to our work, McCoy et al obtained detailed measurements of online pharmaceutical affiliates, showing that individual networks grossed between USD 12.8 million/year to USD 67.7 million/year. In comparison, the long-term rough average we see here is in the order of 150–180M/year for the entire online anonymous marketplace ecosystem. In other words, online marketplaces have seemingly surpassed more “traditional” ways of de-
14 46 24th USENIX Security Symposium livering illicit narcotics. With respect to specific measurements of online anonymous marketplaces, the present paper builds up on our previous work . Surprisingly few other efforts exist attempting to quantitatively characterize the economics of online anonymous marketplaces. Of note, Aldridge and Decary-Hetu  complement our original volume estimates by showing revised numbers of around 90M/year for Silk Road in 2013 right before its takedown. This is roughly in line with our own measurements, albeit slightly more conservative (Figure 5 shows about 300K/day for Silk Road in summer 2013.) More recent work by Dolliver  tries to assess the volumes on Silk Road 2.0. While she does not report volumes, her seller numbers are far smaller than ours, and we suspect her scrapes might have been incomplete. Looking at the problem from a different angle, Meiklejohn et al  provide a detailed analysis of transaction traceability in the Bitcoin network, and show which addresses are related to Silk Road, which in turn could be a useful way of assessing the total volumes of that marketplace. A follow up paper  shows that purported Bitcoin “anonymity” (i.e., unlinkability) is greatly overstated, even when using newer mixing primitives.
- This research was partially supported by the National Science Foundation under ITR award CCF-0424422 (TRUST) and SaTC award CNS-1223762; and by the Department of Homeland Security Science and Technology Directorate, Cyber Security Division (DHS S&T/CSD), the Government of Australia and SPAWAR Systems Center Pacific via contract number N66001-13C-0131
- Darknet stats. https://dnstats.net/.
- Grams: Search the darknet. http://grams7enufi7jmdl.onion.
- Scrapy: An open source web scraping framework for Python. http://scrapy.org.
- United States of America vs. Steven Lloyd Sadler and Jenna M. White, Nov. 2013. United States District Court, Western District of Washington at Seattle. Criminal Complaint MJ13-487.
- Silk Road 2.0 ’hack’ blamed on Bitcoin bug, all funds stolen, Feb. 2014. http://www.forbes.com/sites/andygreenberg/2014/02/13/silk-road-2-0hacked-using-bitcoin-bug-all-its-fundsstolen/.
- Silk Road online drug dealer pleads guilty to trafficking, May 2014. http://www.cbsnews.com/news/silkroad-online-drug-dealer-pleads-guilty-totrafficking/.
- United States of America vs. Blake Benthall, Oct. 2014. United States District Court, Southern District of New York. Sealed Complaint 14MAG2427.
- United States of America vs. Ross William Ulbricht, Feb. 2014. United States District Court, Southern District of New York. Indictment 14CRIM068.
- Bitcoin “exit scam”: deep-web market operators disappear with 12m, Mar. 2015. http://www.theguardian.com/technology/2015/mar/18/bitcoin-deep-webevolution-exit-scam-12-million-dollars/.
- ALDRIDGE, J., AND DE CARY-HE TU, D. Not an “Ebay for drugs”: The cryptomarket “Silk Road” as a paradigm shifting criminal innovation. Available at SSRN 2436643 (2014).
- ANDERSON, R., BARTON, C., BO HME, R., CLAYTON, R., VAN EETEN, M. J., LEVI, M., MOORE, T., AND SAVAGE, S. Measuring the cost of cybercrime. In The economics of information security and privacy. Springer, 2013, pp. 265–300.
- BARRATT, M. J., FERRIS, J. A., AND WINSTOCK, A. R. Use of silk road, the online drug marketplace, in the united kingdom, australia and the united states. Addiction 109, 5 (2014), 774–783.
- CHRISTIN, N. Traveling the Silk Road: A measurement analysis of a large anonymous online marketplace. In Proceedings of the 22nd World Wide Web Conference (WWW’13) (Rio de Janeiro, Brazil, May 2013), pp. 213–224.
- CHRISTIN, N., YANAGIHARA, S., AND KAMATAKI, K. Dissecting one click frauds. In Proc. ACM CCS’10 (Chicago, IL, Oct. 2010).
- DIGITAL CITIZENS ALLIANCE. Busted, but not broken: The state of Silk Road and the darknet marketplaces, Apr. 2014.
- DINGLEDINE, R., MATHEWSON, N., AND SYVERSON, P. Tor: The second-generation onion router. In Proceedings of the 13th USENIX Security Symposium (San Diego, CA, Aug. 2004).
- DOLLIVER, D. Evaluating drug trafficking on the Tor network: Silk Road 2, the sequel. International Journal of Drug Policy (2015).
- GREENBERG, A. An interview with a digital drug lord: The Silk Road’s Dread Pirate Roberts (Q&A), Aug. 2013. http://www.forbes.com/sites/andygreenberg/2013/08/14/an-interview-with-a-digital-drug-lord -the-silk-roads-dread-pirate-roberts-qa/.
- GREENBERG, A. Five men arrested in dutch crackdown on Silk Road copycat, Feb. 2014. //www.forbes.com/sites/andygreenberg/2014/
- HENINGER, N., DURUMERIC, Z., WUSTROW, E., AND HALDERMAN, J. A. Mining your Ps and Qs: Detection of widespread weak keys in network devices. In Proceedings of the 21st USENIX Security Symposium (Bellevue, WA, Aug. 2012). //www.reddit.com/r/DarkNetMarkets/comments/
-  JOHN, J., YU, F., XIE, Y., ABADI, M., AND KRISHNAMURTHY, A. deSEO: Combating search-result poisoning. In Proceedings of USENIX Security 2011 (San Francisco, CA, Aug. 2011).
-  KANICH, C., LEVCHENKO, K., ENRIGHT, B., VOELKER, G., AND SAVAGE, S. The Heisenbot uncertainty problem: challenges in separating bots from chaff. In Proceedings of USENIX LEET’08 (San Francisco, CA, Apr. 2008).
-  KAPLAN, E., AND MEIER, P. Nonparametric estimation from incomplete observations. Journal of the American Statistical Association 53 (1958), 457–481.
-  LENSTRA, A., HUGHES, J. P., AUGIER, M., BOS, J. W., KLEINJUNG, T., AND WACHTER, C. Ron was wrong, Whit is right. Tech. rep., IACR, 2012.
-  LEVCHENKO, K., CHACHRA, N., ENRIGHT, B., FELEGYHAZI, M., GRIER, C., HALVORSON, T., KANICH, C., KREIBICH, C., LIU, H., MCCOY, D., PITSILLIDIS, A., WEAVER, N., PAXSON, V., VOELKER, G., AND SAVAGE, S. Click trajectories: End-to-end analysis of the spam value chain. In Proceedings of IEEE Security and Privacy (Oakland, CA, May 2011).
-  LI, Z., ALRWAIS, S., WANG, X., AND ALOWAISHEQ, E. Hunting the red fox online: Understanding and detection of mass redirect-script injections. In Proceedings of the 2014 IEEE Symposium on Security and Privacy (Oakland’14) (San Jose, CA, May 2014).
-  LU, L., PERDISCI, R., AND LEE, W. SURF: Detecting and measuring search poisoning. In Proceedings of ACM CCS 2011 (Chicago, IL, Oct. 2011).
-  MCCOY, D., PITSILLIDIS, A., JORDAN, G., WEAVER, N., KREIBICH, C., KREBS, B., VOELKER, G., SAVAGE, S., AND LEVCHENKO, K. Pharmaleaks: Understanding the business of online pharmaceutical affiliate programs. In Proceedings of USENIX Security 2012 (Bellevue, WA, Aug. 2012).
-  MEIKLEJOHN, S., AND ORLANDI, C. Privacy-enhancing overlays in bitcoin. In Proceedings of the 2015 BITCOIN research workshop (Puerto Rico, Jan. 2015).
-  MEIKLEJOHN, S., POMAROLE, M., JORDAN, G., LEVCHENKO, K., MCCOY, D., VOELKER, G. M., AND SAVAGE, S. A fistful of bitcoins: characterizing payments among men with no names. In Proceedings of the ACM/USENIX Internet measurement conference (Barcelona, Spain, Oct. 2013), pp. 127–140.
-  MOORE, T., LEONTIADIS, N., AND CHRISTIN, N. Fashion crimes: Trending-term exploitation on the web. In Proceedings of ACM CCS 2011 (Chicago, IL, Oct. 2011).
-  NAKAMOTO, S. Bitcoin: a peer-to-peer electronic cash system, Oct. 2008. Available from http://bitcoin.org/bitcoin.pdf. Sheep marketplace scam reveals everything that’s wrong with the deep web, Dec. 2013.
-  STERBENZ, C. 20-year-old gets 9 years in prison for trying to poison people all over the world, Feb. 2014. http://www.businessinsider.com/r-floridaman-gets-nine-years-prison -in-new-jerseyover-global-poison-plot-2015-2.
-  SUTHERLAND, W. J. Ecological Census Techniques: A Handbook. Cambridge University Press, 1996.
-  THOMAS, K., HUANG, D., WANG, D., BURSZTEIN, E., GRIER, C., HOLT, T., KRUEGEL, C., MCCOY, D., SAVAGE, S., AND VIGNA, G. Framing dependencies introduced by underground commoditization. In Proceedings (online) of the Workshop on Economics of Information Security (WEIS) (June 2015).
-  U.S. ATTORNEY’S OFFICE, SOUTHERN DISTRICT OF NEW YORK. Dozens of online “dark markets” seized pursuant to forfeiture complaint filed in Manhattan federal court in conjunction with the arrest of the operator of Silk Road 2.0, Nov. 2014. http: //www.justice.gov/usao/nys/pressreleases/ November14/DarkMarketTakedown.php.
-  VAN HOUT, M. C., AND BINGHAM, T. silk road, the virtual drug marketplace: A single case study of user experiences. International Journal of Drug Policy 24, 5 (2013), 385–391.
-  WANG, D., DER, M., KARAMI, M., SAUL, L., MCCOY, D., SAVAGE, S., AND VOELKER, G. Search + seizure: The effectiveness of interventions on seo campaigns. In Proceedings of ACM IMC’14 (Vancouver, BC, Canada, Nov. 2014).
-  WANG, D., VOELKER, G., AND SAVAGE, S. Juice: A longitudinal study of an SEO botnet. In Proceedings of NDSS’13 (San Diego, CA, Feb. 2013).