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Use of biometric authentication methods

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(DQ1) Will biometric authentication methods be useful in the future? What kind of attacks could be mounted in practice?

With references.

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Will biometric authentication methods be useful in the future? What kind of attacks could be mounted in practice?

We can authenticate an identity in three ways: by something the user knows (such as a password or personal identification number), something the user has (a security token or smart card) or something the user is (a physical characteristic, such as a fingerprint, called a biometric)
Passwords are cheaper but least secured. Also managing multiple passwords for different systems are a tough and complex.

Biometrics is the automated method of recognizing a person based on a physiological or behavioral characteristic. Biometric technologies are becoming the foundation of an extensive array of highly secure identification and personal verification solutions. (globalsecurity, ...

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This explains the benefit of biometric authentication methods

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