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Chaos-Based Lightweight Cryptographic Algorithm Design and FPGA Implementation.

Yerui Guang1, Longfei Yu1, Wenjie Dong2

  • 1Electronic Engineering College, Heilongjiang University, Harbin 150080, China.

Entropy (Basel, Switzerland)
|November 11, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces the lightweight LZUC cipher, enhancing the ZUC algorithm with a logistic chaotic system for improved security in IoT applications. The new cipher demonstrates strong statistical properties and effective resistance against various cryptographic attacks.

Keywords:
FPGANISTZUCentropy analysisimage encryptionlightweight digital chaoslightweight stream cipher

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Area of Science:

  • Cryptography
  • Information Security
  • Applied Mathematics

Background:

  • The proliferation of IoT and sensor technologies necessitates lightweight cryptographic solutions.
  • Traditional algorithms like ZUC require enhancements for resource-constrained environments.
  • Lightweight ciphers are crucial for securing data in embedded systems and IoT devices.

Purpose of the Study:

  • To propose an effective lightweight cipher, LZUC (lightweight Zu Chongzhi), by integrating a chaotic system into the ZUC algorithm.
  • To enhance the security and statistical properties of the ZUC algorithm for lightweight applications.
  • To design and evaluate an image security system utilizing the proposed LZUC cipher.

Main Methods:

  • Integration of a logistic chaotic system into the LFSR and F-function of the ZUC algorithm.
  • Performance evaluation using NIST statistical tests and information entropy analysis on output key streams.
  • Security analysis against weak key, guess-determination, time-stored data trade-off, and algebraic attacks.
  • Implementation of an image security system with histogram and correlation analysis for plaintext/ciphertext verification.

Main Results:

  • The LZUC cipher achieves effective lightweighting while maintaining good statistical properties.
  • The output key streams exhibit desirable randomness and unpredictability.
  • The algorithm demonstrates robust resistance against common cryptanalytic attacks.
  • The image security system successfully validates the encryption effectiveness of LZUC.

Conclusions:

  • The proposed LZUC cipher offers a viable lightweight cryptographic solution for IoT and sensor networks.
  • The integration of chaotic systems enhances both the security and efficiency of cryptographic algorithms.
  • LZUC provides a strong foundation for secure image transmission and storage in constrained environments.