A Novel Virtual Optical Image Encryption Scheme Created by Combining Chaotic S-Box with Double Random Phase Encoding.

Area of Science:

• Optics
• Cryptography
• Information Security

Background:

• The double random phase encoding (DRPE) system is crucial for encrypted systems but suffers from security vulnerabilities due to its linear nature.
• Existing encryption methods require enhancement to address inherent security weaknesses.

Purpose of the Study:

• To propose a novel and secure optical image encryption scheme.
• To enhance the security of the DRPE system against potential attacks.

Main Methods:

• A chaotic S-box with high nonlinearity and low differential uniformity was designed for image substitution.
• An improved Arnold transformation (IAT) was employed for image scrambling.
• Three chaotic sequences generated from a nonlinear chaotic map were utilized for XOR operations and generating random masks within the DRPE system.

Main Results:

• The proposed scheme effectively integrates chaotic S-boxes, DRPE, and IAT for robust image encryption.
• Chaotic S-boxes provide resistance against algebraic attacks, enhancing overall system security.
• Simulation and performance analysis confirmed the efficiency and security of the developed encryption scheme.

Conclusions:

• The novel optical image encryption scheme offers a significant improvement in security over traditional DRPE systems.
• The combination of chaotic elements and transformations provides a powerful tool for secure image encryption.
• The proposed method is efficient and secure for practical applications in encrypted systems.