Young Kim_JU2_0232.jpg (IMAGE) Purdue University Caption With the rise in the number of fake medications, the U.S. Food and Drug Administration is requiring by 2023 that medications have unit-level traceability through the Drug Supply Chain Security Act. Purdue University biomedical engineers have developed new cyberphysical watermarks that allow people to check the medication’s authenticity with a smartphone. Credit Purdue University photo/John Underwood Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.