New Steganography Scheme in Halftone Images. - Ching-Nung Yang; Yao-Yu Yang; Tse-Shih Chen; Guo-Cin Ye (IIH-MSP, 2008)

Data Hiding in Halftone Images by XOR Block-Wise Operation with Difference Minimization. - Ching-Nung Yang; Guo-Cin Ye; Cheonshik Kim (KSII Trans. Internet Inf. Syst., 2011)