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Efficient IoT User Authentication Protocol with Semi-Trusted Servers.

Shunfang Hu1, Yuanyuan Zhang1, Yanru Guo1

  • 1College of Computer Science, Sichuan University, Chengdu 610065, China.

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Summary
This summary is machine-generated.

This study introduces a new security model and an efficient protocol for Internet of Things (IoT) authentication, enhancing security against insider threats and improving performance. The protocol protects user data and offers better forward security for IoT systems.

Keywords:
insider attacksinternet of thingskey privacysemi-trusted serversuser authentication

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Area of Science:

  • Computer Science
  • Cybersecurity
  • Network Security

Background:

  • Existing Internet of Things (IoT) authentication protocols often rely on fully trusted servers, leaving them vulnerable to insider attacks.
  • Current schemes lack essential security features like resistance to ephemeral secret leakage and offline password guessing, and do not provide perfect forward security.
  • Server computational load in traditional IoT authentication impacts scalability and efficiency due to the large number of users and devices.

Purpose of the Study:

  • To propose a new security model, IoT-3eCK, that assumes semi-trusted servers and an enhanced adversary model for IoT environments.
  • To design an efficient IoT user authentication protocol addressing limitations of existing schemes, including insider attacks and performance bottlenecks.

Main Methods:

  • Developed the IoT-3eCK security model with semi-trusted servers and a strengthened adversary model.
  • Designed a novel authentication protocol incorporating dynamic pseudo-identity anonymous authentication and Elliptic Curve Cryptography (ECC) key exchange.
  • Evaluated protocol security using the random oracle model and automated verification tools.

Main Results:

  • The proposed protocol effectively mitigates insider attacks by protecting user credentials during registration.
  • Achieved significant performance improvements: over 23% reduction in communication costs and over 22% in computational overhead.
  • Demonstrated a remarkable reduction of over 95% in computational overhead specifically at the intermediate server.

Conclusions:

  • The new IoT-3eCK model and protocol offer enhanced security and efficiency for IoT user authentication.
  • The protocol provides crucial security properties, including protection against insider threats and improved forward security.
  • The substantial performance gains, especially for intermediate servers, enhance the scalability and efficiency of IoT systems.