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Human users have a tough time remembering long cryptographic keys. Hence, researchers, for so long, have been examining ways to utilize biometric features of the user instead of a memorable password or passphrase, in an effort to generate strong and repeatable cryptographic keys. The authors objective is to incorporate the volatility of the user's biometric features into the generated key, so as to make the key un-guessable to an attacker lacking significant knowledge of the user's biometrics. They go one step further trying to incorporate multiple biometric modalities into cryptographic key generation so as to provide better security. In this paper, they propose an efficient approach based on multimodal biometrics (Iris and fingerprint) for generation of secure cryptographic key.
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