Optical system for recovering optical interference encryption using grating diffraction

Zhong, Yuan; Chen, Linfei; Gan, W. S.; Liu, Yuanqian; Mao, Haidan

doi:10.1007/s12596-020-00609-3

Cited by 1 publication

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the encryption process, the grating has also taken a major role in the last few years. Encryption with random phase matrix [8], laterally translated phase grating [20], optical double-image cryptography [21], diffraction imaging with interference superposition [22] are recently proposed by researchers. In laterally translated phase grating, a series of random phase masks is placed in the optical path which generates encrypted messages when they are laterally translated by phase grating.…”

Section: Introductionmentioning

confidence: 99%

Efficient Storage and Encryption of 32-Slice CT Scan Images Using Phase Grating

Patra

Saha²,

Bhattacharya

2022

Arab J Sci Eng

View full text Add to dashboard Cite

Medical images are treated as sensitive as it carries patients' confidential information and hence must be protected from unauthorized access. So, a strong encryption mechanism is a primary criterion to transmit these images over the internet to protect them from intruders. In many existing algorithms, noise affection in the extracted images is high, hence not suitable for medical data encryption. Here, we present a new method using phase grating to multiplex as well as encrypting 32 cross-sectional CT scan images (slices) in a single canvas for optimization of storage space and improvement of security. The entire process is divided into a few steps. Before transmission, the main canvas is encrypted with the help of a random phase matrix. The main canvas is further encrypted by the transposition method to enhance security. After decryption, inverse Fourier transform is applied at the proper location of the decrypted canvas to extract the images from the spectra. Quality is measured with peak-signal-to-noise ratio and correlation coefficient methods. Here, it is greater than 38 and the correlation coefficient is close to 1 for all images, thereby indicating of good quality of extracted images. The effect of three common cyber-attacks (viz. known-plaintext attack, chosen-plaintext attack, and chosen-ciphertext attack) is also presented here. The correlation coefficient during cyber-attacks is found to be close to zero, which implies the robustness of the algorithm against cyber-attacks. Finally, a comparison with existing techniques shows the effectiveness of the proposed method.

show abstract

Section: Introductionmentioning

confidence: 99%