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This paper investigates two Physical Unclonable Function (PUF) architectures—Arbiter PUF and Hybrid Oscillator Arbiter (HOA) PUF—for enhancing the security of wearable devices in IoT environments. The study reveals that the HOA PUF achieves a significantly lower power consumption of 2.7 μW compared to 25 μW for the Arbiter PUF while maintaining robust cryptographic key generation capabilities. These findings highlight a viable path for integrating effective security measures in energy-constrained wearable devices, addressing critical privacy concerns in the IoT landscape.
Energy-efficient security for wearable devices just got a boost, with HOA PUF cutting power usage to just 2.7 μW while ensuring robust protection.
The Internet of Things (IoT) was introduced almost two decades ago. In the past two decades, technology has seen huge advancements. Many devices have become powerful and have less power consumption. Many IoT architectures and environments were introduced to help make life easier, especially in wearable devices. The market for these wearable devices has constantly increased over the years and is expected to reach its maximum in the next couple of years. They also pose a threat to users'privacy and security because they constantly store and transmit personal information such as location, heart rate, and other sensitive data. Therefore, addressing the security vulnerabilities is a crucial aspect of this research. This paper presents a hardware-assisted, energy-efficient, low-overhead security solution for wearable devices. Specifically, two Physical Unclonable Function (PUF) architectures: Arbiter PUF and Hybrid Oscillator Arbiter (HOA) PUF are analyzed for integration in IoT systems. The result shows that Arbiter PUF consumes 25 $\mu$W, whereas HOA PUF consumes only 2.7 $\mu$W to generate keys for cryptographic purposes. These architectures introduce minimal power overhead while providing robust security, making them well suited for resource-constrained IoT ecosystems.