Asymmetric cryptosystem using QZ modulation with SPM in Fresnel domain

KS Gaur, H Singh, S Thakran - Journal of Optics, 2023 - Springer
In this paper, we have introduced a new cryptosystem based on QZ modulation with
structured phase mask (SPM) in Fresnel domain. For encryption using QZ decomposition, a …

Optical medical image encryption based on digital hologram in various domains

R Girija, H Singh, G Abirami - Journal of Optics, 2024 - Springer
The use of digital hologram (DH) in optical medical images is analyzed in this paper. These
analyses are done in various domains of double random phase encoding and it has been …

Security-enrichment of an asymmetric optical image encryption-based devil's vortex Fresnel lens phase mask and lower upper decomposition with partial pivoting in …

Anshula, H Singh - Optical and Quantum Electronics, 2021 - Springer
An asymmetric optical cryptosystem to encrypt images using devil's vortex Fresnel lens
(DVFLs) phase masks and lower upper decomposition with partial pivoting (LUDPP) is …

Security-enhanced optical nonlinear cryptosystem based on modified Gerchberg–Saxton iterative algorithm

R Girija, H Singh - Optik, 2021 - Elsevier
For any optical encryption and decryption systems, security is the major concern. In this
paper, security of time varying nonlinear term embedded double random phase encoding …

A cryptoanalysis of elliptic curve cryptography based on phase truncation in the domain of hybrid gyrator Hartley transform

H Singh, R Girija, M Kumar - Optical and Quantum Electronics, 2023 - Springer
The purpose of this paper is to propose an asymmetric double-image encryption scheme
based on phase masks computed by elliptic curve cryptography. A hybrid gyrator Hartley …

Cryptanalysis for double-image encryption using the DTLM in frequency plane with QR decomposition and gyrator transform

Anshula, H Singh - Optical Review, 2021 - Springer
To enhance the security in optical image encryption scheme and to safeguard it from the
invaders, this paper proposes a new scheme using devil's toroidal lens masks (DTLMs) and …

Ensuring security of cryptosystems with DVFM-, modified equal modulus decomposition in the domain of gyrator wavelet transform

Anshula, H Singh - Multimedia Tools and Applications, 2023 - Springer
This paper analyses the security of a nonlinear optical cryptosystem based on double
random phase encoding (DRPE). This article is upgraded through an interference-based …

A secure asymmetric optical image encryption based on phase truncation and singular value decomposition in linear canonical transform domain

A Sangwan, H Singh - International Journal of Optics, 2021 - Wiley Online Library
A new asymmetric optical double image encryption algorithm is proposed, which combines
phase truncation and singular value decomposition. The plain text is encrypted with two …

Introducing real-time image encryption technology using key vault, various transforms, and phase masks

P Yadav, H Singh, K Khanna - Multimedia Tools and Applications, 2023 - Springer
In today's world achieving safe and efficient image transmission is a major issue. The image
is encrypted by using some encryption technique and each algorithm has its strengths and …

Predicting air quality index with machine learning models

G Abirami, R Girija, A Das… - Machine learning and …, 2022 - taylorfrancis.com
During every winter, causalities with disorders via air contamination are rapidly increasing.
WHO's 2018 report states that around 7 million individuals die every 12-month period as a …