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Integrity verified lightweight ciphering for secure medical image sharing between embedded SoCs.

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This study introduces a new lightweight encryption method for secure medical image transmission. The system uses Lorentz attractor keys and a Linear Feedback Shift Register (LFSR) for robust data protection and integrity verification.

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Area of Science:

  • Computer Science
  • Cryptography
  • Medical Imaging

Background:

  • Digital communication necessitates robust security for sensitive medical images.
  • Existing encryption methods may lack efficiency or adequate protection for real-time applications.
  • Data privacy is paramount in online medical data transmission.

Purpose of the Study:

  • To propose a lightweight and robust encryption scheme for securing medical images during transmission.
  • To ensure the integrity and confidentiality of sensitive medical data.
  • To develop a system suitable for real-time and wireless medical applications.

Main Methods:

  • Utilizes Lorentz attractor-derived keys for diffusion and a 16-bit Linear Feedback Shift Register (LFSR) for pseudo-random confusion.
  • Employs Cipher Block Chaining (CBC) for enhanced encryption output.
  • Integrates a 512-bit Whirlpool hashing algorithm for data integrity and a custom symmetric key encryption for hash values.

Main Results:

  • Achieved high sensitivity in hash values with a Hamming distance of 46.5-53.3% (ideal 50%).
  • Encrypted DICOM images showed high entropy (7.99752), low PSNR (5.872 dB), high NPCR (99.66128%), and UACI (33.55964%).
  • Demonstrated robustness against noise attacks and validated effectiveness on Xilinx PYNQ-Z1 SoC with a custom GUI.

Conclusions:

  • The proposed scheme effectively secures medical images, maintaining integrity and resilience against attacks.
  • The lightweight and robust nature makes it suitable for real-time and wireless transmission.
  • Successful implementation and testing confirm its practical applicability in secure medical data handling.