The Department of Computer Science at the College of Science, Al-Nahrain University, discussed the master’s thesis of student Hajar Alaa Al-Din Abdulmajid, titled: “An Optical Encryption Method for Colored Images in RGB and CMY Formats.”
The thesis aimed to enhance data confidentiality during transmission in open environments such as the internet by utilizing optical encryption techniques. This approach relies on splitting the image into random, incomprehensible shares that can only be revealed when correctly overlaid.
The researcher proposed a novel method combining chaotic maps with traditional encryption to improve the security of optical encryption. The approach involved using the Cat Map to shuffle pixel locations within each RGB or CMY color channel, producing six shares for each colored image. To further enhance security, an additional encryption phase was applied to the shares using the AES algorithm with innovative modifications, incorporating the Henon and Logistic maps to generate strong, secure keys.
Keywords:
Optical encryption, colored images, Al-Nahrain University, chaotic maps.