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Password authenticated key exchange-based on Kyber for mobile devices.

Kübra Seyhan1, Sedat Akleylek2,3, Ahmet Faruk Dursun1

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Summary

A new Password-Authenticated Key Exchange (PAKE) version of the NIST PQC standard Kyber, called Kyber.PAKE, is introduced for mobile security. It offers enhanced authentication and perfect forward secrecy with improved runtime performance compared to similar schemes.

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Lattice-based cryptographyPassword-based authenticated key exchangePost-quantum cryptography

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Area of Science:

  • Cryptography
  • Computer Science
  • Information Security

Background:

  • The National Institute of Standards and Technology (NIST) is standardizing post-quantum cryptography (PQC) to secure against quantum computer threats.
  • Password-Authenticated Key Exchange (PAKE) protocols are crucial for secure authentication using passwords.
  • Existing PQC schemes may lack efficient password-based authentication suitable for mobile environments.

Purpose of the Study:

  • To construct a PAKE version of the NIST PQC standard Kyber, named Kyber.PAKE.
  • To ensure mobile compatibility and efficient implementation using simple password components.
  • To provide explicit authentication and perfect forward secrecy (PFS) in the PQC context.

Main Methods:

  • Updating conventional password-based authenticated key exchange (PAK) approaches under module learning with errors (MLWE) assumptions.
  • Integrating password-based authentication into the Kyber PQC standard.
  • Analyzing resistance against password dictionary attacks using the random oracle model (ROM).
  • Conducting security examinations using the cumulative distribution function (CDF) Zipf model.

Main Results:

  • The proposed Kyber.PAKE successfully integrates PAKE functionality into the NIST PQC standard Kyber.
  • Kyber.PAKE demonstrates explicit authentication and perfect forward secrecy (PFS).
  • Implementation results show Kyber.PAKE offers better run-time performance than comparable lattice-based PAKE schemes.

Conclusions:

  • Kyber.PAKE is a viable and efficient solution for post-quantum secure key exchange in mobile environments.
  • The scheme provides robust security against dictionary attacks.
  • The proposed PAKE scheme is well-suited for future security applications in mobile and other domains.