RIVER FALLS — With a disinfecting swipe and a quick two seconds to implant, Sam Bengtson had access to his computer, cell phone, credit card and more — all in the palm of his left hand. Then he put his other hand on the table, jokingly ready to do it all again. Bengtson, the lead developer of a microchip project at Three Square Market, had no reservations about joining about 50 other employees in volunteering to have a radio-frequency identification chip implanted. "I can understand how it can be scary," Bengtson said. "But it is very simple and very secure."