This document discusses palm vein technology for biometric authentication. It begins with an introduction to palm vein scanning and then describes how the technology works by scanning the unique vein patterns in a user's palm. It registers these patterns during enrollment and then authenticates users by comparing live scans to the stored patterns. The technology provides highly accurate identification and strong security since vein patterns are difficult to forge. It has various applications like banking, computers, ID cards, and hospitals due to being contactless, hygienic, and secure.