Design a new visual cryptography for human-verifiable authentication in accessing a database. - Ching-Nung Yang; Li-Zhe Sun; Xuehu Yan; Cheonshik Kim (J. Real Time Image Process., 2016)

Extended color visual cryptography for black and white secret image. - Ching-Nung Yang; Li-Zhe Sun; Song-Ruei Cai (Theor. Comput. Sci., 2016)