An extended visual cryptography scheme (EVCS), for an access structure (Γ Qual, Γ Forb)
on a set of n participants, is a technique to encode n images in such a way that when we …

A novel approach to secret image sharing based on a (k, n)-threshold scheme with the
additional capabilities of steganography and authentication is proposed. A secret image is …

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 …

Visual secret sharing (VSS) scheme is a perfect secure method that protects a secret image
by breaking it into shadow images (called shadows). Unlike other threshold schemes, VSS …

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 …

A random grid in this paper is a transparency comprising a two-dimensional array of pixels
that are either transparent or opaque determined in a totally random way. We design …

A (k, n)-threshold visual cryptography scheme is proposed to encode a secret image into n
shadow images, where any k or more of them can visually recover the secret image, but any …

A visual cryptography scheme is a method to encode a secret image SI into shadow images
called shares such that certain qualified subsets of shares enable the``visual''recovery of the …

The secret sharing schemes in conventional visual cryptography are characterized by
encoding one shared secret into a set of random transparencies which reveal the secret to …

Visual cryptography is a cryptographic paradigm introduced by Naor and Shamir [Lecture
Notes in Comput. Sci., Vol. 950, Springer, Berlin, 1995, p. 1]. Some predefined set of …