ABSTRACT
A Novel asymmetric encryption technique is proposed to carry out the study of an optical security technique for image encryption using triple random phase encoding (TRPE) through fractional Fourier domain. For better security in proposed cryptosystem, Double Random Phase Encoding (DRPE) is converted to TRPE by performing convolution with third random phase mask. In the decryption process two private keys and one public key is used. Numerical Simulations are performed such as histogram, entropy and noise attack analysis to check the robustness of the system. Performance analysis is also done for the proposed system.
