International Journal of Computer Applications
Initially barcodes have been widely used for unique product identification. QR (Quick Response) codes are 2D barcodes that can be used to embed not only product information, but also text, web URL, audio, video, phone contacts, and much more. The authors' paper \"Reversible data hiding using QR codes for android\" is mainly concerned with generating and scanning of QR codes on android smart phones and also they were planning to use QR code for authentication. Their paper is to compress the size of data thus helping the users to share data efficiently and make authentication more efficient using QR code.