Implanted medical device authentication based on comparison of internal IMU signal to external IMU signal

A system for authenticating communication between an implantable medical device (IMD) for implantation in a patient and an external device, the system comprising:

• an IMD capable of being implanted into a patient's body, the IMD comprising:
• a wireless communication module, and
• an internal inertial measurement unit (IMU) capable of measuring vibrations, movement, or rotation,
• wherein the IMD is configured to record an internal IMU signal from the internal IMU;
• an external device located externally to the patient's body comprising:
• a wireless communication module, and
• an external IMU capable of measuring vibrations, movement, or rotation,
• wherein the external device is configured to record an external IMU signal from the external IMU;
• and
• a data processing system comprising computer instructions stored in memory to:
• receive a first level communication comprising the internal IMU signal, the external IMU signal, or both,
• compare data from the internal IMU signal with data from the external IMU signal, and
• authorize a second level communication based on results of the comparison step.