Tagged Visual Cryptography. - Ran-Zan Wang; Shuo-Fang Hsu (IEEE Signal Process. Lett., 2011)

Verifiable Visual Cryptography. - Shuo-Fang Hsu; Yu-Jie Chang; Ran-Zan Wang; Yeuan-Kuen Lee; Shih-Yu Huang (ICGEC, 2012)