Mohammad Ehsan Hemmati - Department of Information Technology, Kermanshah Science and Research Branch, Islamic Azad University, Kermanshah, Iran - Department of Information Technology, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Neda Rezaei - Department of Information Technology, Kermanshah Science and Research Branch, Islamic Azad University, Kermanshah, Iran - Department of Information Technology, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Mehrdad Ahmadzadeh Raji - Department of Mathematics, Razi University, Kermanshah, Iran

Visual secret sharing is a process of distributing the information into multiple encrypted shares, overlapping those shares according to access structure reveals the secret. Among existing image sharing schemes, Boolean-based secret schemes have good performance because they only require XOR calculation. In this paper, we propose a visual secret sharing scheme based on cover images and Boolean operations. The proposed scheme uses a random image generating function, which includes XOR and bit shift sub-functions to generate a random image from cover images. This random image generating function presents a secure scheme that shares a secret image and k cover images among n shared images and recovers the secret image using only these n shared images. Experimental results show that our proposed scheme provides secret sharing with proper security and acceptable computational complexity.

Visual secret sharing, Visual cryptography, Boolean operations