Anti-copy of 2D Barcode Using Multi-encryption Technique. - Suwilai Phumpho; Poomyos Payakkawan; Anurak Jansri; Direk Tongaram; Chirasak Promprayoon; Pithuk Keattipun; Boonchu Ruengpongsrisuck; Chanachai Punnua; Satree Areejit; Pitikhate Sooraksa (UIC/ATC/ScalCom, 2014)