Abstract
In this paper, we propose three-dimensional (3D) photon counting double random phase encryption (DRPE) with enhanced visual quality and security level. Conventional 3D photon counting DRPE can quickly encrypt the data by using the 4f optical system and random phase masks with enhanced security because the 3D photon counting technique is used. 3D photon counting DRPE extracts photons from the encrypted data by using statistical methods such as the Poisson random process, and the visual quality of the decrypted data can be enhanced through the 3D reconstruction process. However, it still has a problem to visualize the data when we extract extremely a few photons. To improve the security and the visual quality of the decrypted data, we propose the random amplitude reconstruction process in the encryption stage. Our proposed method reconstructs the amplitude of the encrypted data at a random depth. Thus, the shifting pixel value and depth information can be another important key for decryption through the random process. Therefore, it can effectively decrypt data securely, and the visual quality of the decrypted data can be enhanced. Finally, through the random reconstruction process in the decryption stage, our proposed method can simultaneously enhance the security and visual quality. To verify our proposed method, we carry out the simulation and optical experiment.
Highlights
R ECENTLY, the development of e-commerce market and smartphone applications have led people to preserve their personal data as an image
Jaehoon Lee et al.: Three-dimensional photon counting optical encryption with enhanced visual quality and security level is more effective for photon counting Double random phase encryption (DRPE) because it can enhance the visual quality of the decrypted data by statistical estimation methods
We propose a new 3D photon counting DRPE with enhanced visual quality and security level
Summary
R ECENTLY, the development of e-commerce market and smartphone applications have led people to preserve their personal data as an image. Jaehoon Lee et al.: Three-dimensional photon counting optical encryption with enhanced visual quality and security level is more effective for photon counting DRPE because it can enhance the visual quality of the decrypted data by statistical estimation methods. It can reconstruct the decrypted data with a certain reconstruction depth which can be another key information for decryption. Since the reconstruction depths are required to generate new elemental image in the encryption process and reconstruct the decrypted data respectively, the security level can be improved. To improve the security level, photon counting has been applied to DRPE [10]–[12]
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