Medical devices, healthcare delivery, and other cyber-physical systems depend on sensors to make safety-critical, automated decisions. My research lab investigates the problem of how to protect cyber-physical systems from adversaries who can maliciously control sensor output by subverting its semiconductor physics. Finding principled, systematic solutions is extremely important to give consumers confidence in innovative medical devices and other emerging technology. Unique to our embedded security research contributions is an emphasis on protecting the longevity of implanted batteries and using software-only approaches to mitigate design flaws in legacy hardware. These contributions were important to creating the field of medical device security; advancing the academic community’s ability to measurably defend against signal injection attacks on sensors; and changing how international regulators evaluate security of consumer products. In this talk, I will highlight academic research on protecting sensor semiconductors from maliciously modulated sound waves, radio waves, and lasers that can compromise software systems in cyber-physical systems such as pacemakers and vaccine cold-chain transportation. Prof. Fu’s lab at Northeastern University in Boston is recruiting highly motivated PhD students from Electrical & Computer Engineering, Computer Science, or Biomedical Engineering for (1) technology and public policy research on health care and medical device security engineering, or (2) research based on the physics of optics, RF, acoustics, and high frequency pulsed lasers for improving sensor semiconductor hardware security.