Hand geometry
Hand geometry technology takes 96 measurements of the hand, including
the width, height, and length of the fingers; distances between joints; and shapes of the knuckles.

  • Easy to capture
  • Believed to be a highly stable pattern over the adult lifespan
  • Not as intrusive as retina and

  • The hand geometry is not unique and cannot be used in identification systems
  • Use requires some training
  • Not sufficiently distinctive for identification over large databases; usually used for verification of a claimed enrollment identity
  • System requires a large amount of physical space

More at:
A Prototype Hand Geometry-based Verication System
Hand geometry
Projected Texture for Hand Geometry based Authentication