A print based tag technology that represents data with colored (often black) or white space to store numbers or text.
Several different barcode formats exist, each with its intended usage, features and limitations. Barcodes can either be 1D (one dimensional) and represent data using lines or 2D (two dimensional) and represent data as pixels.
Barcodes are very cheap to produce compared to other tag technologies; typically under $0.01 per barcode. The low cost of barcodes makes them a good choice for lower value products.
Barcodes offer no security features; they are trivial to clone. Barcodes should not be used to store sensitive information or be used for anti-cloning or anti-counterfeiting.