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Shifted LT Code Security Scheme for Partial Information Encryption.

Si Zhang1, Fanglin Niu1, Lizheng Wang1

  • 1School of Electronics and Information Engineering, Liaoning University of Technology, Jinzhou 121001, China.

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|December 23, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a novel shifted Luby transform (SLT) code for enhanced physical layer security. The scheme ensures secure data transmission even when legal and eavesdropping channels have similar quality, improving information security.

Keywords:
anti-eavesdroppingencryptionpartial information transferphysical layer securityrateless code

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Area of Science:

  • Information Security
  • Coding Theory
  • Wireless Communications

Background:

  • Existing fountain code-based physical layer security struggles when legal and eavesdropping channels have comparable quality.
  • This limitation compromises information security in such scenarios.

Purpose of the Study:

  • To propose a novel shifted Luby transform (SLT) code security scheme for partial information encryption.
  • To enhance physical layer security against eavesdropping, particularly when channel conditions are similar.

Main Methods:

  • The proposed scheme involves two stages: partial information encryption transfer and degree distribution adjustment.
  • Information symbols are randomly extracted and XOR encrypted with a random sequence incorporating main channel noise.
  • Degree distribution is adjusted based on received symbols to increase the average degree of encoded codewords.

Main Results:

  • The scheme effectively hinders eavesdroppers by making initial decoding difficult due to fewer obtained symbols and adjusted degree distribution.
  • Experimental results demonstrate superior security performance compared to other LT anti-eavesdropping schemes.
  • The proposed SLT scheme also exhibits reduced decoding overhead.

Conclusions:

  • The shifted Luby transform (SLT) code provides robust physical layer security, even when the legitimate channel is not dominant.
  • This approach offers improved information security and efficiency over existing methods.