The encryption and decryption technology with chaotic iris and compressed sensing based on computer-generated holography

A symmetric–asymmetric hybrid optical encryption and decryption system is proposed based on chaotic cryptography, compressive sensing (CS), and computer-generated holography (CGH). In this system, there are multiple keys, which have the features of both symmetric and asymmetric cryptography. And the biometric code is unique and unchangeable, not easy to be stolen or lost, which further improves the security of the system. Chaos and CS technology can greatly reduce the amount of information. Combined with the advantages of the digitization of CGH, it is conducive to the preservation and transmission of encrypted information. An effective method to further compress information by using spectrum filtering technology is also studied. The simulation results demonstrated that this scheme is feasible and has better security and higher robustness.