Eun Young Choi is an Assistant United States Attorney for the Southern District New York, where she serves as the Office’s Cybercrime Coordinator and investigates and prosecutes cyber-related crimes, with a particular focus on network intrusions, digital currency, the dark web, and national security investigations. During her tenure at the U.S. Attorney's Office, she has served as the lead prosecutor on a variety of cases, including the investigation of those responsible for the intrusion of and largest-ever theft of customer data from U.S.-based financial institutions, brokerage firms, and financial news publications; an unlicensed Bitcoin exchange and the bribery of a former CEO of a credit union in furtherance of the Bitcoin exchange’s operations; and a business email compromise scheme that targeted two U.S.-based multinational Internet corporations resulting in the loss of over $100 million. Ms. Choi has represented the Government at numerous trials and appeals, including arguing the appeal before the Second Circuit in the case against Ross Ulbricht, the founder and chief administrator of the Silk Road underground website, which was responsible for the sale of over $200 million worth of illegal narcotics and other contraband over the Internet, using the Tor network and Bitcoin.
Prior to joining the U.S. Attorney’s Office, she was an associate at Williams & Connolly LLP, and served as a law clerk to the Honorable Reena Raggi of the United States Court of Appeals for the Second Circuit and the Honorable Naomi Reice Buchwald of the United States District Court for the Southern District of New York. She is a graduate of Harvard Law School and Harvard College.