Physical Layer Key Generation in 5G and Beyond Wireless Communications: Challenges and Opportunities.

Area of Science:

• Wireless Communications Security
• Physical Layer Security
• Cryptography

Background:

• 5G and beyond networks introduce massive data connections with sensitive information, challenging traditional cryptography.
• Traditional secret key distribution protocols face limitations due to 5G features like device-to-device communication and ultra-low latency.
• Channel reciprocity-based key generation (CRKG) emerges as a physical layer technique for secure key establishment.

Purpose of the Study:

• To review Channel Reciprocity-based Key Generation (CRKG) in the context of 5G and beyond wireless technologies.
• To identify opportunities and challenges for CRKG implementation with duplex modes, massive MIMO, and mmWave communications.
• To assess the feasibility and commercial potential of CRKG through prototype analysis.

Main Methods:

• Review of CRKG techniques applied to 5G and beyond candidate technologies.
• Analysis of opportunities and challenges presented by duplex modes, massive MIMO, and mmWave.
• Overview and performance examination of existing CRKG prototypes with various IoT protocols.

Main Results:

• CRKG presents viable solutions for secure key distribution in advanced wireless networks.
• Specific challenges and opportunities are identified for CRKG integration with duplex modes, massive MIMO, and mmWave.
• Prototypes demonstrate promising real-world performance, indicating commercialization potential.

Conclusions:

• CRKG is a feasible and promising physical layer security technique for 5G and beyond communications.
• The technology shows potential for commercialization, addressing key distribution needs in future wireless systems.
• Further research and development can optimize CRKG for diverse IoT applications.