Hand recognition is one of the oldest biometric authentication methods. Compared to fingerprint recognition, it has the advantage that it offers a relatively high level of security
even with dirty or injured hands. Hand recognition is based on three-dimensional hand models. During hand geometry acquisition, the hand shape and finger shape are measured, their thickness, width and length. Scanning the hand shape requires three-dimensional scanning
. In addition to hand shape assessment, there is also hand vein detection.