Data encryption using chaotic mechanical system vibration response signals

• Main Author: Jr, Joseph Leonard Sebastian
• Other Authors: Lin Rongming
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2021
• Subjects: Engineering::Mechanical engineering
• Online Access: https://hdl.handle.net/10356/150766
• Institution: Nanyang Technological University

The aim of the project is to establish the chaotic mechanical system by using an additional cubic spring stiffness and a fractional derivative term in a solid-spring damper system. When an external sinusoidal force is added to the system, the system will be validated to the vibration response. In order to reduce the computing time and simplify the encryption procedure, an approach to the fractional derivative is carried out. An advanced image encryption algorithm centered on a chaotic mechanical system is suggested in this project. The main idea of the project is to develop a chaotic system by adding a cubic spring stiffness and applying fractional derivatives' properties on the second order. The chaotic system’s vibration response signals will be used to create an encryption/decryption key to encrypt/decrypt a colour image. The chaotic system will then be evaluated to ensure that the image encryption is sufficient. Finally, the efficacy of encryption will be measured by visual comparison and numerical analysis to the original image.