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An Image Encryption Algorithm Based on Complex Network Scrambling and Multi-Directional Diffusion.

Yaohui Sheng^1,2, Jinqing Li^1,2, Xiaoqiang Di^1,2,3

¹School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China.

Entropy (Basel, Switzerland)

|September 23, 2022

Summary

This summary is machine-generated.

This study introduces a novel image encryption algorithm using complex network scrambling and multi-directional diffusion. The method enhances security for transmitting keys in public channels, offering robust protection against various cyber attacks.

Keywords:

asymmetric encryption chaotic system complex network image encryption multi-directional diffusion

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Area of Science:

Computer Science
Cryptography
Image Processing

Background:

Public channel key transmission faces significant security threats.
Existing encryption methods may have vulnerabilities.
Need for robust image encryption algorithms is critical.

Purpose of the Study:

To propose a secure image encryption algorithm.
To enhance the security of key transmission.
To develop an algorithm resistant to common attacks.

Main Methods:

Key generation using SHA-512 and transformation mapping.
Image scrambling via complex network construction and pixel/block-level manipulation.
Multi-directional diffusion (forward, middle spiral, backward) for ciphertext generation.

Main Results:

The algorithm demonstrates a large keyspace.
Encrypted images exhibit strong randomness and robustness.
Effective resistance against brute force, statistical, and differential attacks.

Conclusions:

The proposed image encryption algorithm offers enhanced security.
The combination of complex network scrambling and multi-directional diffusion is effective.
The algorithm provides a viable solution for secure image transmission.