Tiny optical tags could replace barcodes -- InformationWeek

Researchers from MIT's Media Lab have created a new optical tag that can store a million times more data than a similarly-sized barcode, without the privacy risks of RFID tags.

The tag, called a Bokode, is only 3mm, much smaller than a typical barcode. It relies on a new way of encoding data: measuring the brightness and angle of light rays coming from a Bokode tag...