A Recursive Threshold Visual Cryptography Scheme

TL;DR

This paper introduces a recursive threshold visual cryptography scheme that efficiently encodes multiple secrets within shares, enhancing secret sharing methods for images and text without increasing share size.

Contribution

The paper proposes a novel recursive hiding scheme for 2-out-of-3 secret sharing that improves efficiency by embedding smaller secrets within larger shares without size expansion.

Findings

Effective recursive hiding of secrets demonstrated on images and text

Increased efficiency in secret sharing schemes

Applicable to multiple data types

Abstract

This paper presents a recursive hiding scheme for 2 out of 3 secret sharing. In recursive hiding of secrets, the user encodes additional information about smaller secrets in the shares of a larger secret without an expansion in the size of the latter, thereby increasing the efficiency of secret sharing. We present applications of our proposed protocol to images as well as text.