Counterfeit parts pose a serious and growing threat to our nation and to NASA. Counterfeiters understand the strengths and weaknesses of the aerospace supply chain process, and they know how to exploit this process for profit. They know who to target to get the counterfeit part entered into the supply system, and how to cover their tracks. To counteract this, NASA has implemented a suite of defenses to guard against the threat of counterfeit parts. By using trusted supply sources, screening parts through the Government-Industry Data Exchange Program, developing rigorous authentication testing methods, educating the NASA workforce and championing legislative/regulatory changes, NASA is working to ensure that counterfeit parts do not impact the safety and success of NASA missions and operations.