A Computationally Efficient Online/Offline Signature Scheme for Underwater Wireless Sensor Networks

Area of Science:

• Computer Science
• Cybersecurity
• Network Engineering

Background:

• Underwater wireless sensor networks (UWSNs) are crucial for data collection in harsh aquatic environments.
• Limited bandwidth and transmission time in UWSNs necessitate efficient data handling.
• Data sensitivity in UWSNs demands robust user authentication and secure access.

Purpose of the Study:

• To propose a novel lightweight digital signature scheme tailored for UWSN constraints.
• To enhance security and efficiency in UWSN data authentication.
• To address the limitations of existing digital signature techniques in underwater environments.

Main Methods:

• Development of a Certificateless Online/Offline Signature (COOS) mechanism.
• Utilizing hyperelliptic curves cryptosystem for smaller key sizes and strong security.
• Security proof in the random oracle model under the hyperelliptic curve discrete logarithm problem.
• Employing the fuzzy-based Evaluation-based Distance from Average Solutions (EDAS) technique for effectiveness demonstration.

Main Results:

• The proposed COOS scheme provides security comparable to RSA, bilinear pairing, and ECC with reduced key sizes.
• The scheme is proven secure against common cryptographic attacks.
• Comparative analysis shows the proposed scheme outperforms existing online/offline signature schemes in security and efficiency.

Conclusions:

• The developed COOS scheme is a secure and efficient solution for authentication in UWSNs.
• Hyperelliptic curves cryptosystem offers a viable approach for lightweight cryptography in resource-constrained networks.
• The proposed mechanism effectively balances security requirements with the unique challenges of underwater communication.