Palm vein technology uses the unique vein patterns in people's palms to identify individuals. It captures an image of the veins by detecting their pattern when illuminated with infrared light. This technology is highly secure because vein patterns are internal and difficult to forge, and also accurate because each person's vein pattern is complex and unique. The contactless and hygienic nature of palm vein scanning makes it suitable for use in public environments such as buildings, banks, and hospitals.