The development and application of multi-biometric solutions are a popular, emerging trend on the global biometrics market. In multi-biometric systems, humans are identified by two or more biometric identifiers.

Multi-biometric identification systems are gaining in popularity: for instance, e-passports and e-IDs are supplemented with digital photos and fingerprints of their holders.

Major Benefits of Multi-biometrics

• Increase of reliability and identification quality, while reducing FAR and FRR error rates;
• A variety of identifiers that can be used conjointly or separately (for instance, the ability to identify a person by fingerprints in case his/her voice or face is considerably altered).
• Speeding up the identification procedure

Variety of Multi-biometric Solutions

Multi-biometric technologies encompass such fusion types as multi-algorithmic and multi-factor identification technology.

In multi-algorithmic systems, identifiers of the same type (such as fingerprints) are processed by using various algorithms. For example, the same fingerprint image is analyzed using minutiae and pattern algorithms. The key target of multi-algorithmic systems is to increase identification reliability.

In multi-factor systems, biometric technologies are supplemented with other identification techniques (a PIN-code, password or smart-card). In this case, to verify one's identity/powers, the user has to undergo biometric identification and produce additional identifiers, as listed above.

The key scope of multi-factor systems is to accelerate the identification procedure and/or make it possible to identify humans without using the central biometric database (for example, when fingerprint templates are encoded into a smart card memory, to identify a person, his/her live fingerprints are compared against the digital templates stored in the card memory).

BioLink solutions based on voice recognition are:

• BioLink AMIS, an automated multi-biometric information system.