Isogeny-based post-quantum proxy signature for Internet of Things

Area of Science:

• Cryptography
• Computer Science
• Information Security

Background:

• The Internet of Things (IoT) faces security challenges in authentication and delegation due to device limitations.
• Existing proxy signature schemes are vulnerable to quantum adversaries.
• There is a need for post-quantum secure solutions in IoT environments.

Purpose of the Study:

• To propose a new isogeny-based post-quantum proxy signature scheme for IoT.
• To ensure secure authentication and delegation in gateway-assisted IoT settings.
• To provide a practical and efficient solution resistant to quantum attacks.

Main Methods:

• Developed an isogeny-based proxy signature scheme (CSI-PS) leveraging the Group Action Inverse Problem (GAIP).
• Designed the scheme for gateway-assisted IoT, offloading computations to capable entities.
• Analyzed storage, communication, Merkle-authentication, key-distribution, and setup costs.

Main Results:

• The proposed CSI-PS scheme provides post-quantum security for IoT authentication and delegation.
• Expensive isogeny operations are handled by gateways, reducing sensor node burden.
• The scheme demonstrates a favorable balance between security and efficiency.

Conclusions:

• CSI-PS offers a practical and provably secure (EUF-CMA) solution for post-quantum IoT security.
• The scheme effectively addresses the limitations of current proxy signature schemes against quantum threats.
• This work contributes a viable cryptographic primitive for securing future IoT ecosystems.