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Unibiometric systems are simply getting outdated with the evolution of multi-biometric systems. By combining the biometric traits for identification and verification, a multi-biometric system is considered to be far better performer than its traditional counterpart, which used only single biometric trait for the same. To understand the difference in a better way, here are some of the advantages of biometric products with multiple biometric traits.

• More Universal Approach: A multi-biometric system is known to follow the universal approach, by offering more than one option to get enrolled with the system. For instance, in case a person is not able to provide his or her fingerprints as biometric samples, a multi-biometric system can use some other trait for the process of enrollment. Thus, a flexible approach can be followed that remains impossible with unibiometric systems.
• Easy Search in Large Biometric Database: A huge biometric database can be made search efficient by employing more than one biometric trait as the search criterions. For instance, a biometric search can return the list of various individuals sharing similar facial traits using the features of face. Then, the list can be searched using fingerprint samples to figure out the exact individual.
• Quality of Search Data: Consider the situation in which, a unibiometric system uses voice patterns to identify the individuals, but fails to do so because of a noisy data signal captured by the reader. To handle the situation, an additional trait can be integrated with the existing one to ensure good quality of data used for searching through the biometric database.
• Better Security: The multi-biometric systems enhance the level of security, which indeed is the most important aim to be achieved with biometric applications. The people with bad intentions might get successful in cheating a unibiometric system, but the multi-biometric systems are difficult to be deceived. It is nearly impossible for the criminals to obtain two traits of the same individual. Thus, a sophisticated level of security helps the multi-biometric systems to perform better than the traditional systems.

A constant advancement in the field of biometrics has delivered the products in the form of multi-biometric systems, capable of extending biometric security to higher level.

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