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A biometric system is essentially a pattern recognition system that makes use of biometric traits to recognize individuals. The objective is to establish an identity based on who you are or what you produce, rather than by what you possess or what you know. This new paradigm not only provides enhanced security but also avoids, in authentication applications, the need to remember multiple passwords and maintain multiple authentication tokens. Who you are refers to physiological characteristics such as fingerprints, iris, or face. What you produce refers to behavioral patterns that characterize your identity such as the voice or the written signature.

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