Evaluating privacy, security, and fraud concerns with Obamacare's information sharing apparatus : joint hearing before the Subcommittee on Energy Policy, Health Care, and Entitlements of the Committee on Oversight and Government Reform and the Subcommittee on Cybersecurity, Infrastructure Protection, and Security Technologies of the Committee on Homeland Security, House of Representatives, One Hundred Thirteenth Congress, first session, July 17, 2013.