The governor of California, Jerry Brown, has vetoed a bill that would have seen an option for radio frequency identification tags offered to applicants for new driver's licenses.The decision follows criticism that the feature could have opened the cards up to hacking of a holders data, such as a person's race or citizenship status.The potential benefits of having RFID were that it could make crossing the United States-Mexico border easier and quicker.States including New York, Michigan and Washington, all have voluntary RFID programs and some private companies have been implementing RFID tags to monitor employee movements.Although he veto the bill, Brown did suggest that he was in favor of the point of the bill, which was to speed up border crossings.