Cloud storage has become eminent, with an increasing amount of data being produced daily; this led to substantial concerns related privacy and unauthorized access. To secure privacy, users can protect their private by uploading encrypted the cloud. Data encryption allows computations be performed on without decrypted in cloud, which requires enormous computation resources prevents access data. ...

During recent decades, double random phase encoding grasped more attention for researchers. To achieve nonlinearity, it had been done with S-Box. We exhibit this involvement that DRPE system is much vulnerable in the above methodology. Concatenating anything needs an imaginary value, wherein S-Box unsuccessful it. Used has reformed into various sizes. Due to scenario, values are replicating. So...

Due to the rapid growth of telemedicine and healthcare services, color medical image security applications have been expanded precipitously. In this paper, an asymmetric PTFrFT (Phase Truncated Fractional Fourier Transform)-based cryptosystem is suggested. Two different phases in fractional output planes are provided as deciphering keys. Accordingly, ciphering keys will not be employed for proc...

An optical image encryption technique based on compressive sensing using fully optical means has been proposed. An object image is first encrypted to a white-sense stationary noise pattern using a double random phase encoding (DRPE) method in a Mach-Zehnder interferometer. Then, the encrypted image is highly compressed to a signal using single-pixel compressive holographic imaging in the optica...

Two modified Gerchberg-Saxton (GS) iterative phase retrieval algorithms are proposed. The first we refer to as the spatial phase perturbation GS algorithm (SPP GSA). The second is a combined GS hybrid input-output algorithm (GS/HIOA). In this paper (Part I), it is demonstrated that the SPP GS and GS/HIO algorithms are both much better at avoiding stagnation during phase retrieval, allowing them...

Most current security and authentication systems are based on personal biometrics. The problem is a major issue in the field of biometric systems. This due to use databases original Then biometrics will forever be lost if these attacked. Protecting privacy most important goal cancelable In order protect privacy, therefore, should non-invertible such way that no information can inverted from tem...

Biometric security is a growing trend, as it supports the authentication of persons using confidential biometric data. Most transmitted data in multimedia systems are susceptible to attacks, which affect these systems. provide sufficient protection and privacy for users. The recently-introduced cancellable recognition have not been investigated presence different types attacks. In addition, the...

a Institut für Technische Optik, Universität Stuttgart, 70569 Stuttgart, Germany b School of Electrical, Electronic and Mechanical Engineering, College of Engineering, Mathematics and Physical Sciences, Optoelectronic Research Centre, The SFI-Strategic Research Cluster in Solar Energy Conversion, University College Dublin, Belfield, Dublin 4, Ireland Department of Computer Science, National Uni...