Abstract
Consumer electronics manufacturers have been incorporating support for 4G/5G communication technologies into many electronic devices. Thus, highly capable Internet of Things (IoT)-ready versions of electronic devices are being purchased which will eventually replace traditional consumer electronics. With the goal of creating a smart environment, the IoT devices enable data sharing, sensing, awareness, increased control. Enabled by high-speed networks, the IoT devices function in a group setting thus compounding the attack surface leading to security and privacy concerns. This research is a study on the possibility of incorporating PUF as a basis for group key generation. The challenge here lies in identifying device features that are unique, stable, reproducible and unpredictable by an adversary. Each device generates its own identity leading to collaborative cryptographic key generation in a group setting. The research uses a comprehensive hardware testbed to demonstrate the viability of PUFs for the generation of a symmetric key through collaboration. Detailed analysis of the proposed setup and the symmetric key generation scheme has shown that the system is scalable and offers unrivalled advantages compared to conventional cryptographic implementations.
Highlights
To provision security services via physically unclonable functions (PUF), this study presents a novel symmetric key generation algorithm based on which groups of Internet of Things (IoT) devices can communicate
G is a large prime number used as an exponential base, N is a large prime number used for order of the algebraic group, R is the hash of PUF identity PID with a random number and “Previous” is an array of intermediate values received from the previous participant
4G/5G ready versions of consumer electronics can be purchased that leverage the power of the high-speed networks to create the IoT which is an environment based on sensing, increased connectivity and information sharing
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Cyber-physical systems have been realised in the form of smart devices and interconnections have been created in the IoT environment. A common characteristic of IoT devices is that they continuously monitor the physical environment and communicate data through a network interface. IoT devices are group-oriented and their interaction has caused physical trust boundaries and the virtual trust boundaries to overlap. This in itself compounds the security of the IoT device and its user. This research studies the bias in a MEMS accelerometer as a PUF feature to form a device identifier that can be used for the generation of group cryptographic key. IoT security scheme based on PUF that can be implemented in the group environment
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