Multiple Information Hiding Using Circular Random Grids

Abstract

Abstract Security has become an inseparable issue as information technology is of vital importance. Information Security ensures mathematical techniques and related aspects to provide for confidentiality, data security, entity authentication and data origin authentication. However, apart from the mathematical models there are several schemes which provide information security ensuring high capacity and secrecy. These schemes are quintessential to provide a robust system that covers all aspects of information security at the same time involving high data capacity, ease of use and secrecy. Visual cryptography is a new technique which provides information security using simple algorithm unlike the complex, computationally intensive algorithms used in other techniques like traditional cryptography. This technique allows visual information to be encrypted in such a way that their decryption can be performed by the Human Visual System (HVS), without any complex cryptographic algorithms. Circular Random Grids extends the functionality by hiding more data in circular grids to provide confidentiality and secrecy without risking suspicion of an intruder. The simple 2:2 secret sharing scheme is extended to hide more than one secret message. Thus a high data capacity is also achieved in the proposed scheme.