A partition based visual secret sharing schemes for large images

摘要

In last one decade, the secret sharing schemes get utmost importance because of their possibility to use in variety of applications. Visual secret sharing also known as visual cryptography (VC) is an extension of secret sharing scheme. Visual cryptography has many uses if secret is to revealed through human eyes, as it is not always possible to use electronic device for decoding the secrets. In this paper, we propose a partition based visual cryptography scheme scheme which is useful for those images which are large in size and making the transparencies for the shares are practically infeasible. The proposed scheme uses a method of partitioning where input image is divided into independent segments and each segment undergoes to visual cryptography encoding. The experimental results shows the efficacy of proposed system.