In the modern era, the secure transmission and storage of information are among the utmost
priorities. Optical security protocols have demonstrated significant advantages over digital …

In this paper, we propose a novel dual-user image authentication algorithm based on the
double fractional Mellin transform. We perform a security analysis of the nonlinear …

In this paper, a new multiuser optical image encryption and authentication technique is
proposed. Sparse multiplexing and polar decomposition are used in the Fresnel domain to …

In this paper, we propose a new multiuser nonlinear optical cryptosystem using fractional-
order vortex speckle (FOVS) patterns as security keys. In conventional optical cryptosystems …

In this paper, we have proposed an asymmetric optical cryptosystem using polar
decomposition and Shearlet transform (ST). Polar decomposition is employed to generate …

In this paper, a new algorithm for image encryption is proposed based on three chaotic
systems which are Chen system, logistic map and two-dimensional (2D) Arnold cat map …

With the development of Internet technology, images have become widely used in people's
daily life. However, some images carry significant importance and sensitivity, making the …

A self-recovery watermarking algorithm for important financial information content
authentication is proposed in this paper. The algorithm firstly pre-processes the source …

Security is a major challenge in storage and transmission of digital data. Secret sharing
scheme is a fundamental primitive used in multiparty computations, access control and key …

In the present time, the substantial advances in communication technology have prompted
many challenges including secure transmission of sensitive information. Optical techniques …