Demonstration and a practical scheme of the optical asymmetric cryptosystem

In recent years, researchers have been focused on the optical asymmetric cryptosystem (OACS). The encryption key and decryption key are independent, the fact of which overcomes the linearity defect of optical encryption system. So the OACS has attracted more and more researchers' attention. We have deeply studied the existing OACS, and found that the cryptosystem is unable to realize communication in practice. In this paper, we demonstrate the shortcomings of the present OACS and propose a practical scheme. The analysis shows that this scheme meets the communication protocol of asymmetric cryptography (ACS).