Using Vibration for Secure Pairing With Implantable Medical Devices: Development and Usability Study.

Area of Science:

• Biomedical Engineering
• Cybersecurity
• Human-Computer Interaction

Background:

• Implantable medical devices (IMDs) increasingly rely on wireless communication, necessitating secure pairing methods.
• Existing pairing approaches often lack user perception, creating security vulnerabilities.
• User-imperceptible pairing can compromise patient safety and data integrity.

Purpose of the Study:

• To explore the use of perceptible vibrations for secure IMD pairing.
• To propose a novel technique using human motor behavior as a shared entropy source for pairing.
• To develop a deployable solution for current IMD products.

Main Methods:

• Developed a proof-of-concept wearable prototype simulating IMD patient interaction.
• Utilized accelerometer readings and signal processing for secure pairing.
• Evaluated the technique's accuracy, security, and usability in a lab study with 24 participants.

Main Results:

• Achieved high pairing accuracy with a zero false acceptance rate and 0.6% false rejection rate.
• Demonstrated robust security, passing NIST statistical tests.
• Reported high usability with an average System Usability Scale score of 73.6 and efficient pairing within 5 seconds.

Conclusions:

• Vibration-based pairing offers a secure, usable, and deployable solution for IMDs.
• The proposed method has lenient requirements for IMD sensing and synchronization.
• This technique enhances patient safety by making the pairing process perceptible.