An enhanced color visual cryptography scheme based on the binary dragonfly algorithm

Visual cryptography is an encryption technique that decomposes a secret image into multiple shares that are digitally 'overlapped' based on logical operations to recover the original secret image. Each individual share cannot reveal clues about the secret image. Existing visual cryptograph...

Full description

Saved in:
Bibliographic Details
Published in:International journal of computers & applications Vol. 44; no. 7; pp. 623 - 632
Main Authors: Ibrahim, Dyala R., Abdullah, Rosni, Teh, Je Sen
Format: Journal Article
Language:English
Published: Calgary Taylor & Francis 03.07.2022
Taylor & Francis Ltd
Subjects:
Algorithms
Color imagery
Complexity
Cryptography
Dragonfly algorithm
Encryption
Histograms
Image quality
Image reconstruction
optimization algorithm
secret sharing
security
visual cryptography
ISSN:1206-212X, 1925-7074
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Visual cryptography is an encryption technique that decomposes a secret image into multiple shares that are digitally 'overlapped' based on logical operations to recover the original secret image. Each individual share cannot reveal clues about the secret image. Existing visual cryptography schemes suffer from problems such as pixel expansion, high computational complexity and poor decryption quality. To overcome these problems, we propose a new 2-out-of-2 secret sharing scheme for color images based on the binary dragonfly algorithm. The dragonfly algorithm is used to determine optimal color levels for the encryption process, which leads to reconstructed images with the higher quality upon decryption with minimal effect on the overall computational complexity. The proposed scheme is also non-expansible, whereby the share images are of the same size as the original secret image. This leads to reduced memory requirements as well as improved image quality. We analyze the strength of the proposed scheme based on a standard set of metrics which includes an evaluation of its resistance against cryptanalytic attacks, histogram, correlation, entropy and encryption quality. Results show that the proposed visual cryptography scheme has desired properties such as improved recovered image quality, near-ideal statistical characteristics and fast encryption speed, depicting an improvement over existing schemes.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1206-212X
1925-7074
DOI:10.1080/1206212X.2020.1859244