Abstract: As the secure data transmission has become a very important issue these days, various barcoding techniques have given a lot of relief in encoding the data into barcodes. The various barcodes like 1D Barcode, Line barcode, PDF457, QR Code, which have various data encoding techniques. But the major drawback of the existing barcodes is that the amount of data that can be encoded into barcodes is very small due to which becomes very difficult to encode larger data into these barcodes. So the paper makes a study about the existing barcoding techniques and thereby get a clear picture about what can be done for encoding the large amount of data. The comparative study of the existing systems is analysed in this paper.
Keywords: Barcoding techniques, data encoding, 2d Barcode, data transmission, security.