Characteristic

Fingerprints

Hand geometry

Retina

Iris

Face

Signature

Voice

Ease of use

High

High

low

Medium

Medium

High

High

Error incidence

Dryness, dirt, age

Hand injury

Glasses

Poor lighting

Lighting, age, glasses, hair

Changing signatures

Noise, colds, weather

Accuracy

High

High

Very high

Very high

High

High

High

Cost

*

*

*

*

*

*

*

User acceptance

Medium

Medium

Medium

Medium

Medium

Very high

High

Required security level

High

Medium

High

Very high

Medium

Medium

Medium

Long term stability

High

Medium

High

High

Medium

Medium

Medium