A Low-Power Dual-Factor Authentication Unit for Secure Implantable Devices
Abstract
This paper presents a dual-factor authentication protocol and its low-power implementation for security of implantable medical devices (IMDs). The protocol incorporates traditional cryptographic first-factor authentication using Datagram Transport Layer Security - Pre-Shared Key (DTLS-PSK) followed by the user's touch-based voluntary second-factor authentication for enhanced security. With a low-power compact always-on wake-up timer and touch-based wake-up circuitry, our test chip consumes only 735 pW idle state power at 20.15 Hz and 2.5 V. The hardware accelerated dual-factor authentication unit consumes 8 W at 660 kHz and 0.87 V. Our test chip was coupled with commercial Bluetooth Low Energy (BLE) transceiver, DC-DC converter, touch sensor and coin cell battery to demonstrate standalone implantable operation and also tested using in-vitro measurement setup.
Cite
@article{arxiv.2004.13709,
title = {A Low-Power Dual-Factor Authentication Unit for Secure Implantable Devices},
author = {Saurav Maji and Utsav Banerjee and Samuel H Fuller and Mohamed R Abdelhamid and Phillip M Nadeau and Rabia Tugce Yazicigil and Anantha P Chandrakasan},
journal= {arXiv preprint arXiv:2004.13709},
year = {2020}
}
Comments
Published in 2020 IEEE Custom Integrated Circuits Conference (CICC)