Authors:
Kazuhide Fukushima
;
Seira Hidano
and
Shinsaku Kiyomoto
Affiliation:
KDDI R&D Laboratories and Inc., Japan
Keyword(s):
Wearable, IoT, Smartphone, Sensor, Accelerometer, Gyroscope, PUF.
Related
Ontology
Subjects/Areas/Topics:
Identification, Authentication and Non-Repudiation
;
Information and Systems Security
;
Network Security
;
Sensor and Mobile Ad Hoc Network Security
;
Software Security
Abstract:
The Physically Unclonable Function (PUF) is a technique that generates unique device identifiers based on
variations in the manufacturing process. The Internet of Things (IoT) has become widespread, and various
kinds of devices are now available. Device authentication and key management are essential to provide a
secure service to these devices. We can use the unforgeable identifier generated by the PUF as a key for
encryption and authentication. However, the existing PUFs require a dedicated hardware or low-level software,
i.e., driver. Thus, they are impractical to use on smartphones or IoT devices due to the severe limitations
of production cost and power consumption. In this paper, we propose a sensor-based PUF that utilizes the
accelerometer and gyroscope, which are widely available on smartphones and IoT devices. We implement
the proposed PUF on a smartwatch and show that accelerometer-based PUF achieves good usability, extreme
robustness, and a high entropy of 91.66 bits.