The safeguarding of digitized data against unwanted access and modification has become
an issue of utmost importance as a direct result of the rapid development of network …

Cryptography is the process by which a readable message is converted into cipher-text
unintelligible to an eavesdropper. With the advent of the internet, improved network …

Traditional secret sharing schemes involve complex computation. A visual secret sharing
(VSS) scheme decodes the secret without computation, but each shadow is m times as big …

Recently, the visual secret sharing (VSS) technique by random grids (RG), proposed by Kafri
and Keren in 1987, has drawn attention in academia again to remove the abovementioned …

Random grids (RG)-based visual secret sharing (VSS) scheme can easily avoid the pixel
expansion problem as well as requires no codebook design. However, previous scheme still …

A (k, n) visual cryptographic scheme (VCS) encodes a secret image into n shadow images
(printed on transparencies) distributed among n participants. When any k participants …

Visual secret sharing (VSS), also called visual cryptography, allows a secret image to be
divided into several shares and the secret image can only be recovered through the …

Two common drawbacks of the visual cryptography scheme (VCS) are the large pixel
expansion of each share image and the small contrast of the recovered secret image. In this …

Pixel expansion and visual quality of the revealed secret image are two major concerns in
visual secret sharing (VSS). Random grid (RG) is an alternative approach to solve the pixel …

Abstract Recently, Chen and Wu propose a (n, n) multi secret image sharing (MSIS) scheme
that shares n secret images into n shared images. These n shared images can be together …