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Unconditional Authentication Based on Physical Layer Offered Chain Key in Wireless Communication.

Shaoyu Wang1, Kaizhi Huang1, Xiaoming Xu1

  • 1Wireless Communication Technology Office, Information Engineering University, Zhengzhou 450002, China.

Entropy (Basel, Switzerland)
|April 23, 2022
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Summary
This summary is machine-generated.

This study introduces a novel wireless unconditional authentication framework using one-time keys from the wireless channel. This approach offers robust security against attackers with infinite computing power, enhancing wireless communication security.

Keywords:
physical layer key generationunconditional authenticationwireless communication

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Area of Science:

  • Wireless Communication Security
  • Information Theory
  • Cryptography

Background:

  • Wireless communication faces impersonation and substitution attacks due to vulnerable air interfaces.
  • Existing authentication methods (cryptography-based, physical layer fingerprint-based) are vulnerable to infinite computing power attackers.
  • Data integrity is not well protected by current physical layer fingerprinting methods.

Purpose of the Study:

  • To develop a wireless unconditional authentication framework resistant to infinite computing power attackers.
  • To propose and analyze the performance of a novel authentication framework.
  • To provide a new perspective for securing wireless communications.

Main Methods:

  • Proposed a physical layer offered chain key (PHYLOCK) structure for generating one-time keys.
  • Generated one-time keys by XORing physical layer updated keys from channel state information (CSI) and previous chain keys.
  • Analyzed security using information theory and derived the boundary of deception probability.

Main Results:

  • Achieved a probability of deception of 2^-12Hk, where Hk is the entropy of the one-time key.
  • Established conditions for unconditional authentication.
  • Demonstrated that key and authentication code lengths must be twice the message length.

Conclusions:

  • The proposed unconditional authentication framework offers a new method to resist infinite computing power attackers.
  • PHYLOCK structure effectively provides one-time keys for unconditional authentication.
  • Specific conditions on key length, authentication code length, and encoding rules are necessary for unconditional authentication.