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 …

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 …

Conventional visual secret sharing schemes generate noise-like random pixels on shares to
hide secret images. It suffers a management problem, because of which dealers cannot …

Visual cryptography is a special type of secret sharing. Two models of visual cryptography
have been independently studied: 1) deterministic visual cryptography, introduced by Naor …

Though there have been many research works carried out on the grayscale secret image
sharing schemes, there is not sufficient research work available on the field of color secret …

In a visual cryptography scheme a secret image is encoded into n shares, in the form of
transparencies. The shares are then distributed to n participants. Qualified subsets of …

In the literature of secret sharing, the property of essential secret sharing scheme ensures
that no set of participants, missing at least one essential participant, should be able to get …

Though the monochrome (black and white) visual cryptography has a very rich literature, a
very few papers have been published for the construction of general access structure. In this …

The transition of visual secret sharing from a black & white secret image to a color image is
not straight-forward. There are several models of color superposition principle. In this paper …

In this paper we propose the use of colors to improve visual cryptography schemes for black-
and-white secret images. The resulting model is called colored-black-and-white visual …