The secret sharing (SS) scheme has been widely used as the de facto paradigm for group
key management in cryptography and distributed computation. An SS scheme for a general …

Secret sharing (SS) is one of the most important cryptographic primitives used for data
outsourcing. The (t, n) SS was introduced by Shamir and Blakley separately in 1979. The …

This book offers a mathematical foundation for modern cryptography. It is primarily intended
as an introduction for graduate students. Readers should have basic knowledge of …

In this research, we consider the evolving threshold access structure, denoted as, for size
invariant visual cryptography scheme (SIVCS). The so-called threshold indicates the number …

Existing block-based progressive visual cryptography schemes (BPVCS) that prevent
cheating are limited to (2, n) and (k, n) thresholds. They are unsuitable for implementing …

In this paper, we present a new approach for sharing images between l players by exploiting
the additive and multiplicative homomorphic properties of two well-known public key …

Secret key backup is safely implemented even if a role base access structure in which the
access structure is specified using roles is used. An all combination generating unit 107 …

The paper proposes a type of secret sharing schemes called ramp assignment schemes
(RAS's) to realize general access structures (AS's). In such a scheme, each participant is …

A secret sharing scheme is a cryptographic technique to protect a secret from loss and
leakage by dividing it into shares. A ramp secret sharing scheme can improve efficiency in …

We show a construction of a quantum ramp secret sharing scheme from a nested pair of
linear codes. Necessary and sufficient conditions for qualified sets and forbidden sets are …