Multi-secret sharing threshold access structure

This paper proposes threshold access structure for multi-secret sharing. It uses a two-level encoding for share generation from multiple secret images. In the first level of encoding secure Boolean based operations are used. The second level of encoding uses Chinese remainder theorem and Lagrange Interpolation. It is mainly useful for secure encryption of multiple secret images with two levels of encoding. It has the ability to recover secret images without any distortion. Another advantage is to share n secret images among k shares. This scheme is free from pixel expansion problem.