Secure storage and retrieval schemes for multiple encrypted digital holograms with orthogonal phase encoding multiplexing

Abstract

Recent developments in 3D computational optical imaging such as digital holographic microscopy has ushered in a new era for biological research. Therefore, efficient and secure storage and retrieval of digital holograms is a challenging task for future cloud computing services. In this study, we propose a novel scheme to securely store and retrieve multiple encrypted digital holograms by using phase encoding multiplexing. In the proposed schemes, an encrypted hologram can only be accessed using a binary phase mask, which is the key to retrieve the image. In addition, it is possible to independently store, retrieve, and manage the encrypted digital holograms without affecting other groups of the encrypted holograms multiplexed using different sets of binary phase masks, due to the orthogonality properties of the Hadamard matrices with high autocorrelation and low cross-correlation. The desired encrypted holograms may also be searched for, removed, and added independently of other groups of the encrypted holograms. More and more 3D images or digital holograms can be securely and efficiently stored, retrieved, and managed.

Angle Multiplexing Optical Image Encryption in the Fresnel Transform Domain Using Phase-Only Computer-Generated Hologram

“…The contributions of optical experiments on image multiplexing based on various manipulation schemes have been widely proposed since last decade [36][37][38][39][40][41]. For example, the multiplexing methods for images and movies can be based on aperture-modulated optical systems [36], joint transform correlator architectures [37,38], using the CGH and maximum length cellular automata [39], the DRPE and orthogonal phase encoding [40], and the multiplexed view-coded orbital angular momentum beam [41]. The practical issues associated with the optical experiments of the proposed method can be explored in these studies.…”

An encrypted hiding scheme for 3D objects based on CGH and Henon mapping

“…Compared with 2D information, three-dimensional (3D) information can accurately record the depth, location, and spatial relationship of information, which has greater capacity and richer information and shows more apparent advantages in terms of storage capacity, transmission, and display [10]. Consequently, encryption of 3D information has emerged as a critical area of research, including diffraction imaging [11], integral imaging [12,13], digital holography [14,15], and computer-generated hologram (CGH) [16,17]. Among them, CGH has the advantages of flexible operation, easy storage, and simple reconstruction in virtual and realistic 3D objects and has attracted much attention.…”

Optical Encryption Using Attention-Inserted Physics-Driven Single-Pixel Imaging

“…Optical encryption mainly uses optical principles and techniques for information encryption and decryption, offering advantages such as high speed, enhanced security, and resistance to jamming and attacks, making it an important development direction in the field of information security. Traditional optical encryption mainly relies on double-random phase-encoding techniques [1-4], optical interference principles [5][6][7], phase recovery algorithms [8][9][10], and computational holography methods [11][12][13]. However, these methods generally require complex optical systems and sophisticated optical components and are susceptible to environmental noise and optical device errors, resulting in poor encryption and reduced security.…”