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Crypto-coding technique based on polar code and secret key generated from wireless channel characteristics for

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Area of Science:

  • Wireless Communications
  • Information Theory
  • Cryptography

Background:

  • Modern digital wireless communication systems rely on crypto-coding for data security and error correction.
  • Existing methods often require additional hardware, increasing complexity and cost.
  • Integrating encryption and channel coding into a single step is desirable for efficiency.

Purpose of the Study:

  • To propose and evaluate a novel crypto-coding technique combining polar codes with a secret key.
  • To enhance system security and reliability without additional hardware overhead.
  • To assess the technique's performance against passive eavesdropping attacks.

Main Methods:

  • A crypto-coding technique is proposed using polar codes.
  • A secret key is derived from wireless channel characteristics.
  • The secret key is split: part for frozen bits, part XORed with information bits.
  • Simulations are conducted in Additive White Gaussian Noise (AWGN) channels with varying key and code lengths.

Main Results:

  • The proposed technique achieves comparable Bit Error Rate (BER) performance to traditional polar codes.
  • Computational complexity remains similar to existing methods.
  • The technique effectively prevents eavesdropping by degrading decoding performance for unauthorized receivers.
  • No additional hardware is required for key management and distribution.

Conclusions:

  • The proposed crypto-coding technique offers a secure and reliable solution for wireless communications.
  • It achieves performance parity with existing methods while enhancing security against passive eavesdropping.
  • The integration of channel coding and encryption in a single step, with channel-derived keys, is efficient and hardware-sparing.