A Novel Chaotic Image Encryption Scheme Armed with Global Dynamic Selection.

Area of Science:

• Cryptography
• Information Security
• Applied Mathematics

Background:

• Existing chaotic image encryption schemes are vulnerable to chosen-plaintext and chosen-ciphertext attacks due to equivalent keys.
• Plaintext-related schemes offer improved security but require an impractical, absolutely secure channel for transmitting plaintext parameters.
• The need for practical, secure, and robust chaotic image encryption methods remains critical.

Purpose of the Study:

• To propose a novel chaotic image encryption scheme that overcomes the limitations of existing methods.
• To enhance the security of chaotic image encryption against sophisticated attacks.
• To eliminate the requirement for an additional secure channel for transmitting plaintext-related information.

Main Methods:

• A chaotic sequence dynamically selects DNA encoding rules.
• A multi-parallel structure is used for permutation on the DNA-encoded matrix.
• Another chaotic sequence dynamically selects DNA decoding rules.
• Ciphertext feedback mechanism determines dynamic diffusion rules for global selection.

Main Results:

• The proposed scheme achieves global dynamic selection, ensuring no equivalent keys.
• The encryption method demonstrates resistance to chosen-ciphertext and chosen-plaintext attacks.
• The scheme is practical as it does not require an additional secure channel for parameter transmission.
• Theoretical analysis and numerical experiments validate the method's feasibility.

Conclusions:

• The novel chaotic image encryption scheme based on global dynamic selection offers enhanced security and practicality.
• This approach effectively addresses the vulnerabilities of previous chaotic encryption methods.
• The method provides a robust solution for secure image encryption without relying on infeasible secure channels.