N
Naveen K. Nishchal
Researcher at Indian Institute of Technology Patna
Publications - 135
Citations - 2732
Naveen K. Nishchal is an academic researcher from Indian Institute of Technology Patna. The author has contributed to research in topics: Encryption & Fourier transform. The author has an hindex of 27, co-authored 119 publications receiving 2279 citations. Previous affiliations of Naveen K. Nishchal include Indian Institute of Technology Delhi & Indian Institute of Technology Guwahati.
Papers
More filters
Journal ArticleDOI
Known-plaintext attack-based optical cryptosystem using phase-truncated Fresnel transform
TL;DR: A scheme for information security under the basic double random phase encoding framework but with enhanced complexity and immunity against the known-plaintext attack, and presents the computer simulation results of multiple gray-scale images without any cross talk and also for a color image.
Journal ArticleDOI
Asymmetric color cryptosystem using polarization selective diffractive optical element and structured phase mask
TL;DR: A single channel asymmetric color image encryption scheme is proposed that uses an amplitude- and phase- truncation approach with interference of polarized wavefronts to alleviate the alignment problem of interference and does not need iterative encoding and offers multiple levels of security.
Journal ArticleDOI
Flexible optical encryption with multiple users and multiple security levels
TL;DR: A basic optical encryption architecture that admits several cryptography applications based on multiplexing, where users can decrypt different private images from the same encrypted image, a superuser can have a key that decrypts all encrypted images, and multiplexed images can be encrypted with different levels of security.
Journal ArticleDOI
Retrieval and classification of shape-based objects using Fourier, generic Fourier, and wavelet-Fourier descriptors technique: A comparative study
TL;DR: It was observed that WFD performs better than FD and GFD technique, and the effect of the noise on the retrieval and classification of shapes of different objects, additive and multiplicative noise of various variances were applied.
Journal ArticleDOI
Image fusion using wavelet transform and its application to asymmetric cryptosystem and hiding
Isha Mehra,Naveen K. Nishchal +1 more
TL;DR: Computer simulation results support the idea of the proposed fused color image encryption scheme, which provides enlarged key space and hence enhanced security in the asymmetric encryption scheme.