Improve the Joint Image Encryption Technology of JTC and FRFT

The emergence of the fractional Fourier transform has greatly expanded the application methods of the Fourier transform and received extensive attention. Applying the fractional Fourier transform to image encryption, taking advantage of its controllable fractional order and high sensitivity of the order, will significantly enhance the security performance of encryption. This paper applies the fractional Fourier Transform to the JTC (Joint Transform Correlator) encryption system and proposes an image encryption technology based on JTC and FRFT, effectively improving the security performance of the encryption system. Finally, the feasibility and effectiveness of the system were simulated using MTLAB.