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PUFchain 2.0: Hardware-Assisted Robust Blockchain for Sustainable Simultaneous Device and Data Security in Smart

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This study introduces PUFchain 2.0, a hardware-assisted blockchain for smart healthcare security. It uses physical unclonable functions (PUF) for secure device and data authentication in Internet of Medical Things (IoMT).

Keywords:
BlockchainHealthcare cyber-physical system (H-CPS)Implantable medical devices (IMD)Internet of Medical Things (IoMT)Physical unclonable functions (PUF)Proof of PUF-enabled authentication (PoP)Wearable medical devices (WMD)

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Area of Science:

  • Computer Science
  • Cybersecurity
  • Biomedical Engineering

Background:

  • Smart healthcare relies on secure Internet of Medical Things (IoMT) devices for data integrity and patient safety.
  • Existing security solutions often struggle with scalability and robust authentication for a growing number of connected medical devices.

Purpose of the Study:

  • To present PUFchain 2.0, a novel hardware-assisted blockchain system for integrated device and data security in smart healthcare.
  • To introduce a scalable authentication mechanism for IoMT devices using physical unclonable functions (PUF) and blockchain technology.

Main Methods:

  • Integration of physical unclonable functions (PUF) as a hardware security primitive with blockchain technology to create PUFchain 2.0.
  • Development of a two-level authentication mechanism utilizing PUF keys linked to unique Media Access Control (MAC) addresses.
  • Implementation of a Proof of PUF-Enabled authentication consensus mechanism and experimental validation using Arbiter PUFs.

Main Results:

  • PUFchain 2.0 demonstrates a scalable approach by enabling IoMT devices to obtain PUF keys from an edge server, reducing the need for individual PUF modules per device.
  • Experimental validation showed 75% reliability from 200 PUF keys and a 48% Hamming distance for the PUF module.
  • The system successfully integrates PUF keys into the blockchain for robust authentication of IoMT devices.

Conclusions:

  • PUFchain 2.0 offers a viable and robust hardware-assisted blockchain solution for enhancing security in smart healthcare applications.
  • The proposed system addresses scalability challenges and provides secure, unique authentication for IoMT devices.
  • The findings validate the potential of PUFchain 2.0 for securing sensitive medical data and devices in the evolving healthcare landscape.